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Finding the Fourth Proportional to 399,017.88, 598,617.03 and 132,788.90

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Solution

The fourth proportional to 399,017.88, 598,617.03 and 132,788.90 is: 199,213.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,017.88 : 598,617.03 = 132,788.90 : x
  2. Step 2: Convert to fraction form
    399,017.88/598,617.03 = 132,788.90/x
  3. Step 3: Cross multiply
    399,017.88x = 598,617.03 × 132,788.90
  4. Step 4: Simplify right side
    399,017.88x = 79,489,698,929.47
  5. Step 5: Solve for x
    x = 79,489,698,929.47/399,017.88
  6. Step 6: Final answer
    x = 199,213.38

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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.