Home / 521,432.40-782,148.60-395,461.20

Finding the Fourth Proportional to 521,432.40, 782,148.60 and 395,461.20

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Solution

The fourth proportional to 521,432.40, 782,148.60 and 395,461.20 is: 593,191.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,432.40 : 782,148.60 = 395,461.20 : x
  2. Step 2: Convert to fraction form
    521,432.40/782,148.60 = 395,461.20/x
  3. Step 3: Cross multiply
    521,432.40x = 782,148.60 × 395,461.20
  4. Step 4: Simplify right side
    521,432.40x = 309,309,423,934.32
  5. Step 5: Solve for x
    x = 309,309,423,934.32/521,432.40
  6. Step 6: Final answer
    x = 593,191.80

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Similar ratio
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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.