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Finding the Fourth Proportional to 629,928.80, 944,893.20 and 315,000.80

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Solution

The fourth proportional to 629,928.80, 944,893.20 and 315,000.80 is: 472,501.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,928.80 : 944,893.20 = 315,000.80 : x
  2. Step 2: Convert to fraction form
    629,928.80/944,893.20 = 315,000.80/x
  3. Step 3: Cross multiply
    629,928.80x = 944,893.20 × 315,000.80
  4. Step 4: Simplify right side
    629,928.80x = 297,642,113,914.56
  5. Step 5: Solve for x
    x = 297,642,113,914.56/629,928.80
  6. Step 6: Final answer
    x = 472,501.20

Related Problems

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Half scale
Find fourth proportional to 1,259,857.60, 1,889,786.40 and 630,001.60
Double scale
Find fourth proportional to 629,929.80, 944,894.70 and 315,001.80
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.