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Finding the Fourth Proportional to 391,031.60, 587,713.80 and 384,033.20

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Solution

The fourth proportional to 391,031.60, 587,713.80 and 384,033.20 is: 577,195.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,031.60 : 587,713.80 = 384,033.20 : x
  2. Step 2: Convert to fraction form
    391,031.60/587,713.80 = 384,033.20/x
  3. Step 3: Cross multiply
    391,031.60x = 587,713.80 × 384,033.20
  4. Step 4: Simplify right side
    391,031.60x = 225,701,611,298.16
  5. Step 5: Solve for x
    x = 225,701,611,298.16/391,031.60
  6. Step 6: Final answer
    x = 577,195.32

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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.