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Finding the Fourth Proportional to 644,999.80, 967,499.70 and 408,609.40

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Solution

The fourth proportional to 644,999.80, 967,499.70 and 408,609.40 is: 612,914.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,999.80 : 967,499.70 = 408,609.40 : x
  2. Step 2: Convert to fraction form
    644,999.80/967,499.70 = 408,609.40/x
  3. Step 3: Cross multiply
    644,999.80x = 967,499.70 × 408,609.40
  4. Step 4: Simplify right side
    644,999.80x = 395,329,471,917.18
  5. Step 5: Solve for x
    x = 395,329,471,917.18/644,999.80
  6. Step 6: Final answer
    x = 612,914.10

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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.