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Finding the Fourth Proportional to 865,641.92, 1,298,054.21 and 505,915.97

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Solution

The fourth proportional to 865,641.92, 1,298,054.21 and 505,915.97 is: 758,635.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,641.92 : 1,298,054.21 = 505,915.97 : x
  2. Step 2: Convert to fraction form
    865,641.92/1,298,054.21 = 505,915.97/x
  3. Step 3: Cross multiply
    865,641.92x = 1,298,054.21 × 505,915.97
  4. Step 4: Simplify right side
    865,641.92x = 656,706,345,744.88
  5. Step 5: Solve for x
    x = 656,706,345,744.88/865,641.92
  6. Step 6: Final answer
    x = 758,635.11

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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.