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Finding the Fourth Proportional to 647,999.20, 971,221.20 and 332,293.60

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Solution

The fourth proportional to 647,999.20, 971,221.20 and 332,293.60 is: 498,041.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,999.20 : 971,221.20 = 332,293.60 : x
  2. Step 2: Convert to fraction form
    647,999.20/971,221.20 = 332,293.60/x
  3. Step 3: Cross multiply
    647,999.20x = 971,221.20 × 332,293.60
  4. Step 4: Simplify right side
    647,999.20x = 322,730,588,944.32
  5. Step 5: Solve for x
    x = 322,730,588,944.32/647,999.20
  6. Step 6: Final answer
    x = 498,041.65

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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.