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Finding the Fourth Proportional to 458,331.70, 687,497.55 and 418,933.30

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Solution

The fourth proportional to 458,331.70, 687,497.55 and 418,933.30 is: 628,399.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,331.70 : 687,497.55 = 418,933.30 : x
  2. Step 2: Convert to fraction form
    458,331.70/687,497.55 = 418,933.30/x
  3. Step 3: Cross multiply
    458,331.70x = 687,497.55 × 418,933.30
  4. Step 4: Simplify right side
    458,331.70x = 288,015,617,363.42
  5. Step 5: Solve for x
    x = 288,015,617,363.42/458,331.70
  6. Step 6: Final answer
    x = 628,399.95

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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.