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Finding the Fourth Proportional to 458,000.10, 687,000.15 and 407,261.70

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Solution

The fourth proportional to 458,000.10, 687,000.15 and 407,261.70 is: 610,892.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,000.10 : 687,000.15 = 407,261.70 : x
  2. Step 2: Convert to fraction form
    458,000.10/687,000.15 = 407,261.70/x
  3. Step 3: Cross multiply
    458,000.10x = 687,000.15 × 407,261.70
  4. Step 4: Simplify right side
    458,000.10x = 279,788,848,989.26
  5. Step 5: Solve for x
    x = 279,788,848,989.26/458,000.10
  6. Step 6: Final answer
    x = 610,892.55

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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.