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Finding the Fourth Proportional to 391,451.80, 587,177.70 and 325,024.60

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Solution

The fourth proportional to 391,451.80, 587,177.70 and 325,024.60 is: 487,536.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,451.80 : 587,177.70 = 325,024.60 : x
  2. Step 2: Convert to fraction form
    391,451.80/587,177.70 = 325,024.60/x
  3. Step 3: Cross multiply
    391,451.80x = 587,177.70 × 325,024.60
  4. Step 4: Simplify right side
    391,451.80x = 190,847,197,071.42
  5. Step 5: Solve for x
    x = 190,847,197,071.42/391,451.80
  6. Step 6: Final answer
    x = 487,536.90

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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.