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Finding the Fourth Proportional to 493,381.12, 740,016.60 and 138,408.88

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Solution

The fourth proportional to 493,381.12, 740,016.60 and 138,408.88 is: 207,597.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,381.12 : 740,016.60 = 138,408.88 : x
  2. Step 2: Convert to fraction form
    493,381.12/740,016.60 = 138,408.88/x
  3. Step 3: Cross multiply
    493,381.12x = 740,016.60 × 138,408.88
  4. Step 4: Simplify right side
    493,381.12x = 102,424,868,787.41
  5. Step 5: Solve for x
    x = 102,424,868,787.41/493,381.12
  6. Step 6: Final answer
    x = 207,597.87

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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.