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Finding the Fourth Proportional to 391,348.80, 587,023.20 and 141,998.40

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Solution

The fourth proportional to 391,348.80, 587,023.20 and 141,998.40 is: 212,997.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,348.80 : 587,023.20 = 141,998.40 : x
  2. Step 2: Convert to fraction form
    391,348.80/587,023.20 = 141,998.40/x
  3. Step 3: Cross multiply
    391,348.80x = 587,023.20 × 141,998.40
  4. Step 4: Simplify right side
    391,348.80x = 83,356,355,162.88
  5. Step 5: Solve for x
    x = 83,356,355,162.88/391,348.80
  6. Step 6: Final answer
    x = 212,997.60

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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.