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Finding the Fourth Proportional to 664,915.68, 997,393.68 and 215,624.16

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Solution

The fourth proportional to 664,915.68, 997,393.68 and 215,624.16 is: 323,442.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,915.68 : 997,393.68 = 215,624.16 : x
  2. Step 2: Convert to fraction form
    664,915.68/997,393.68 = 215,624.16/x
  3. Step 3: Cross multiply
    664,915.68x = 997,393.68 × 215,624.16
  4. Step 4: Simplify right side
    664,915.68x = 215,062,174,439.31
  5. Step 5: Solve for x
    x = 215,062,174,439.31/664,915.68
  6. Step 6: Final answer
    x = 323,442.78

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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.