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Finding the Fourth Proportional to 996,957.20, 1,495,630.20 and 428,337.20

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Solution

The fourth proportional to 996,957.20, 1,495,630.20 and 428,337.20 is: 642,589.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    996,957.20 : 1,495,630.20 = 428,337.20 : x
  2. Step 2: Convert to fraction form
    996,957.20/1,495,630.20 = 428,337.20/x
  3. Step 3: Cross multiply
    996,957.20x = 1,495,630.20 × 428,337.20
  4. Step 4: Simplify right side
    996,957.20x = 640,634,052,103.44
  5. Step 5: Solve for x
    x = 640,634,052,103.44/996,957.20
  6. Step 6: Final answer
    x = 642,589.32

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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.