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Finding the Fourth Proportional to 391,035.60, 587,719.80 and 384,037.20

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Solution

The fourth proportional to 391,035.60, 587,719.80 and 384,037.20 is: 577,201.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,035.60 : 587,719.80 = 384,037.20 : x
  2. Step 2: Convert to fraction form
    391,035.60/587,719.80 = 384,037.20/x
  3. Step 3: Cross multiply
    391,035.60x = 587,719.80 × 384,037.20
  4. Step 4: Simplify right side
    391,035.60x = 225,706,266,376.56
  5. Step 5: Solve for x
    x = 225,706,266,376.56/391,035.60
  6. Step 6: Final answer
    x = 577,201.32

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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.