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Finding the Fourth Proportional to 558,840.72, 838,252.92 and 138,116.64

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Solution

The fourth proportional to 558,840.72, 838,252.92 and 138,116.64 is: 207,172.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,840.72 : 838,252.92 = 138,116.64 : x
  2. Step 2: Convert to fraction form
    558,840.72/838,252.92 = 138,116.64/x
  3. Step 3: Cross multiply
    558,840.72x = 838,252.92 × 138,116.64
  4. Step 4: Simplify right side
    558,840.72x = 115,776,676,780.59
  5. Step 5: Solve for x
    x = 115,776,676,780.59/558,840.72
  6. Step 6: Final answer
    x = 207,172.94

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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.