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Finding the Fourth Proportional to 399,751.87, 599,562.12 and 143,531.40

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Solution

The fourth proportional to 399,751.87, 599,562.12 and 143,531.40 is: 215,273.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,751.87 : 599,562.12 = 143,531.40 : x
  2. Step 2: Convert to fraction form
    399,751.87/599,562.12 = 143,531.40/x
  3. Step 3: Cross multiply
    399,751.87x = 599,562.12 × 143,531.40
  4. Step 4: Simplify right side
    399,751.87x = 86,055,987,683.97
  5. Step 5: Solve for x
    x = 86,055,987,683.97/399,751.87
  6. Step 6: Final answer
    x = 215,273.51

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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.