Home / 645,122.80-966,906.60-329,417.20

Finding the Fourth Proportional to 645,122.80, 966,906.60 and 329,417.20

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Solution

The fourth proportional to 645,122.80, 966,906.60 and 329,417.20 is: 493,728.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,122.80 : 966,906.60 = 329,417.20 : x
  2. Step 2: Convert to fraction form
    645,122.80/966,906.60 = 329,417.20/x
  3. Step 3: Cross multiply
    645,122.80x = 966,906.60 × 329,417.20
  4. Step 4: Simplify right side
    645,122.80x = 318,515,664,833.52
  5. Step 5: Solve for x
    x = 318,515,664,833.52/645,122.80
  6. Step 6: Final answer
    x = 493,728.74

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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.