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Finding the Fourth Proportional to 438,877.56, 658,248.93 and 139,319.22

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Solution

The fourth proportional to 438,877.56, 658,248.93 and 139,319.22 is: 208,957.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,877.56 : 658,248.93 = 139,319.22 : x
  2. Step 2: Convert to fraction form
    438,877.56/658,248.93 = 139,319.22/x
  3. Step 3: Cross multiply
    438,877.56x = 658,248.93 × 139,319.22
  4. Step 4: Simplify right side
    438,877.56x = 91,706,727,493.43
  5. Step 5: Solve for x
    x = 91,706,727,493.43/438,877.56
  6. Step 6: Final answer
    x = 208,957.43

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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.