Home / 711,423.48-981,711.18-389,116.92

Finding the Fourth Proportional to 711,423.48, 981,711.18 and 389,116.92

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Solution

The fourth proportional to 711,423.48, 981,711.18 and 389,116.92 is: 536,952.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,423.48 : 981,711.18 = 389,116.92 : x
  2. Step 2: Convert to fraction form
    711,423.48/981,711.18 = 389,116.92/x
  3. Step 3: Cross multiply
    711,423.48x = 981,711.18 × 389,116.92
  4. Step 4: Simplify right side
    711,423.48x = 382,000,430,691.17
  5. Step 5: Solve for x
    x = 382,000,430,691.17/711,423.48
  6. Step 6: Final answer
    x = 536,952.24

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.