Home / 399,531.20-551,331.96-218,240.50

Finding the Fourth Proportional to 399,531.20, 551,331.96 and 218,240.50

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Solution

The fourth proportional to 399,531.20, 551,331.96 and 218,240.50 is: 301,160.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,531.20 : 551,331.96 = 218,240.50 : x
  2. Step 2: Convert to fraction form
    399,531.20/551,331.96 = 218,240.50/x
  3. Step 3: Cross multiply
    399,531.20x = 551,331.96 × 218,240.50
  4. Step 4: Simplify right side
    399,531.20x = 120,322,962,616.38
  5. Step 5: Solve for x
    x = 120,322,962,616.38/399,531.20
  6. Step 6: Final answer
    x = 301,160.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.