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Finding the Fourth Proportional to 399,218.90, 598,911.55 and 133,062.10

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Solution

The fourth proportional to 399,218.90, 598,911.55 and 133,062.10 is: 199,620.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,218.90 : 598,911.55 = 133,062.10 : x
  2. Step 2: Convert to fraction form
    399,218.90/598,911.55 = 133,062.10/x
  3. Step 3: Cross multiply
    399,218.90x = 598,911.55 × 133,062.10
  4. Step 4: Simplify right side
    399,218.90x = 79,692,428,557.26
  5. Step 5: Solve for x
    x = 79,692,428,557.26/399,218.90
  6. Step 6: Final answer
    x = 199,620.88

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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.