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Finding the Fourth Proportional to 629,739.60, 944,609.40 and 405,790.80

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Solution

The fourth proportional to 629,739.60, 944,609.40 and 405,790.80 is: 608,686.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,739.60 : 944,609.40 = 405,790.80 : x
  2. Step 2: Convert to fraction form
    629,739.60/944,609.40 = 405,790.80/x
  3. Step 3: Cross multiply
    629,739.60x = 944,609.40 × 405,790.80
  4. Step 4: Simplify right side
    629,739.60x = 383,313,804,113.52
  5. Step 5: Solve for x
    x = 383,313,804,113.52/629,739.60
  6. Step 6: Final answer
    x = 608,686.20

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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.