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Finding the Fourth Proportional to 629,908.80, 944,863.20 and 393,712.80

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Solution

The fourth proportional to 629,908.80, 944,863.20 and 393,712.80 is: 590,569.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,908.80 : 944,863.20 = 393,712.80 : x
  2. Step 2: Convert to fraction form
    629,908.80/944,863.20 = 393,712.80/x
  3. Step 3: Cross multiply
    629,908.80x = 944,863.20 × 393,712.80
  4. Step 4: Simplify right side
    629,908.80x = 372,004,736,088.96
  5. Step 5: Solve for x
    x = 372,004,736,088.96/629,908.80
  6. Step 6: Final answer
    x = 590,569.20

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Double scale
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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.