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Finding the Fourth Proportional to 654,045.20, 981,694.20 and 338,728.40

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Solution

The fourth proportional to 654,045.20, 981,694.20 and 338,728.40 is: 508,417.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,045.20 : 981,694.20 = 338,728.40 : x
  2. Step 2: Convert to fraction form
    654,045.20/981,694.20 = 338,728.40/x
  3. Step 3: Cross multiply
    654,045.20x = 981,694.20 × 338,728.40
  4. Step 4: Simplify right side
    654,045.20x = 332,527,705,655.28
  5. Step 5: Solve for x
    x = 332,527,705,655.28/654,045.20
  6. Step 6: Final answer
    x = 508,417.01

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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.