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Finding the Fourth Proportional to 387,114, 580,671 and 106,631.28

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Solution

The fourth proportional to 387,114, 580,671 and 106,631.28 is: 159,946.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,114 : 580,671 = 106,631.28 : x
  2. Step 2: Convert to fraction form
    387,114/580,671 = 106,631.28/x
  3. Step 3: Cross multiply
    387,114x = 580,671 × 106,631.28
  4. Step 4: Simplify right side
    387,114x = 61,917,691,988.88
  5. Step 5: Solve for x
    x = 61,917,691,988.88/387,114
  6. Step 6: Final answer
    x = 159,946.92

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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.