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Finding the Fourth Proportional to 458,232.30, 687,348.45 and 399,183.30

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Solution

The fourth proportional to 458,232.30, 687,348.45 and 399,183.30 is: 598,774.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,232.30 : 687,348.45 = 399,183.30 : x
  2. Step 2: Convert to fraction form
    458,232.30/687,348.45 = 399,183.30/x
  3. Step 3: Cross multiply
    458,232.30x = 687,348.45 × 399,183.30
  4. Step 4: Simplify right side
    458,232.30x = 274,378,022,520.89
  5. Step 5: Solve for x
    x = 274,378,022,520.89/458,232.30
  6. Step 6: Final answer
    x = 598,774.95

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Double scale
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Similar ratio
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1.5x scale

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.