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Finding the Fourth Proportional to 458,214.30, 687,321.45 and 399,165.30

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Solution

The fourth proportional to 458,214.30, 687,321.45 and 399,165.30 is: 598,747.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,214.30 : 687,321.45 = 399,165.30 : x
  2. Step 2: Convert to fraction form
    458,214.30/687,321.45 = 399,165.30/x
  3. Step 3: Cross multiply
    458,214.30x = 687,321.45 × 399,165.30
  4. Step 4: Simplify right side
    458,214.30x = 274,354,872,785.69
  5. Step 5: Solve for x
    x = 274,354,872,785.69/458,214.30
  6. Step 6: Final answer
    x = 598,747.95

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Similar ratio
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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.