Home / 458,631.40-687,363.90-408,476.20

Finding the Fourth Proportional to 458,631.40, 687,363.90 and 408,476.20

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Solution

The fourth proportional to 458,631.40, 687,363.90 and 408,476.20 is: 612,194.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,631.40 : 687,363.90 = 408,476.20 : x
  2. Step 2: Convert to fraction form
    458,631.40/687,363.90 = 408,476.20/x
  3. Step 3: Cross multiply
    458,631.40x = 687,363.90 × 408,476.20
  4. Step 4: Simplify right side
    458,631.40x = 280,771,793,889.18
  5. Step 5: Solve for x
    x = 280,771,793,889.18/458,631.40
  6. Step 6: Final answer
    x = 612,194.88

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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.