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Finding the Fourth Proportional to 465,940.28, 698,872.79 and 128,987.10

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Solution

The fourth proportional to 465,940.28, 698,872.79 and 128,987.10 is: 193,470.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    465,940.28 : 698,872.79 = 128,987.10 : x
  2. Step 2: Convert to fraction form
    465,940.28/698,872.79 = 128,987.10/x
  3. Step 3: Cross multiply
    465,940.28x = 698,872.79 × 128,987.10
  4. Step 4: Simplify right side
    465,940.28x = 90,145,574,773.48
  5. Step 5: Solve for x
    x = 90,145,574,773.48/465,940.28
  6. Step 6: Final answer
    x = 193,470.23

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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.