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Finding the Fourth Proportional to 492,888.64, 739,379.52 and 137,902.72

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Solution

The fourth proportional to 492,888.64, 739,379.52 and 137,902.72 is: 206,867.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,888.64 : 739,379.52 = 137,902.72 : x
  2. Step 2: Convert to fraction form
    492,888.64/739,379.52 = 137,902.72/x
  3. Step 3: Cross multiply
    492,888.64x = 739,379.52 × 137,902.72
  4. Step 4: Simplify right side
    492,888.64x = 101,962,446,920.29
  5. Step 5: Solve for x
    x = 101,962,446,920.29/492,888.64
  6. Step 6: Final answer
    x = 206,867.11

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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.