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Finding the Fourth Proportional to 653,432.80, 980,149.20 and 321,656.80

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Solution

The fourth proportional to 653,432.80, 980,149.20 and 321,656.80 is: 482,485.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,432.80 : 980,149.20 = 321,656.80 : x
  2. Step 2: Convert to fraction form
    653,432.80/980,149.20 = 321,656.80/x
  3. Step 3: Cross multiply
    653,432.80x = 980,149.20 × 321,656.80
  4. Step 4: Simplify right side
    653,432.80x = 315,271,655,194.56
  5. Step 5: Solve for x
    x = 315,271,655,194.56/653,432.80
  6. Step 6: Final answer
    x = 482,485.20

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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.