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Finding the Fourth Proportional to 458,232.40, 686,765.40 and 408,077.20

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Solution

The fourth proportional to 458,232.40, 686,765.40 and 408,077.20 is: 611,596.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,232.40 : 686,765.40 = 408,077.20 : x
  2. Step 2: Convert to fraction form
    458,232.40/686,765.40 = 408,077.20/x
  3. Step 3: Cross multiply
    458,232.40x = 686,765.40 × 408,077.20
  4. Step 4: Simplify right side
    458,232.40x = 280,253,301,488.88
  5. Step 5: Solve for x
    x = 280,253,301,488.88/458,232.40
  6. Step 6: Final answer
    x = 611,596.43

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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.