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Finding the Fourth Proportional to 6,479,613.72, 9,719,289.36 and 1,687,196.88

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Solution

The fourth proportional to 6,479,613.72, 9,719,289.36 and 1,687,196.88 is: 2,530,761.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,479,613.72 : 9,719,289.36 = 1,687,196.88 : x
  2. Step 2: Convert to fraction form
    6,479,613.72/9,719,289.36 = 1,687,196.88/x
  3. Step 3: Cross multiply
    6,479,613.72x = 9,719,289.36 × 1,687,196.88
  4. Step 4: Simplify right side
    6,479,613.72x = 16,398,354,684,009.20
  5. Step 5: Solve for x
    x = 16,398,354,684,009.20/6,479,613.72
  6. Step 6: Final answer
    x = 2,530,761.15

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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.