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Finding the Fourth Proportional to 458,247.80, 687,371.70 and 325,278.20

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Solution

The fourth proportional to 458,247.80, 687,371.70 and 325,278.20 is: 487,917.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,247.80 : 687,371.70 = 325,278.20 : x
  2. Step 2: Convert to fraction form
    458,247.80/687,371.70 = 325,278.20/x
  3. Step 3: Cross multiply
    458,247.80x = 687,371.70 × 325,278.20
  4. Step 4: Simplify right side
    458,247.80x = 223,587,029,306.94
  5. Step 5: Solve for x
    x = 223,587,029,306.94/458,247.80
  6. Step 6: Final answer
    x = 487,917.30

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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.