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Finding the Fourth Proportional to 391,337.60, 587,443.80 and 302,982.80

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Solution

The fourth proportional to 391,337.60, 587,443.80 and 302,982.80 is: 454,812.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,337.60 : 587,443.80 = 302,982.80 : x
  2. Step 2: Convert to fraction form
    391,337.60/587,443.80 = 302,982.80/x
  3. Step 3: Cross multiply
    391,337.60x = 587,443.80 × 302,982.80
  4. Step 4: Simplify right side
    391,337.60x = 177,985,367,366.64
  5. Step 5: Solve for x
    x = 177,985,367,366.64/391,337.60
  6. Step 6: Final answer
    x = 454,812.85

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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.