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Finding the Fourth Proportional to 981,812.80, 1,472,719.20 and 508,643.20

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Solution

The fourth proportional to 981,812.80, 1,472,719.20 and 508,643.20 is: 762,964.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    981,812.80 : 1,472,719.20 = 508,643.20 : x
  2. Step 2: Convert to fraction form
    981,812.80/1,472,719.20 = 508,643.20/x
  3. Step 3: Cross multiply
    981,812.80x = 1,472,719.20 × 508,643.20
  4. Step 4: Simplify right side
    981,812.80x = 749,088,606,589.44
  5. Step 5: Solve for x
    x = 749,088,606,589.44/981,812.80
  6. Step 6: Final answer
    x = 762,964.80

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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.