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Finding the Fourth Proportional to 646,860.72, 970,478.28 and 267,711.48

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Solution

The fourth proportional to 646,860.72, 970,478.28 and 267,711.48 is: 401,644.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,860.72 : 970,478.28 = 267,711.48 : x
  2. Step 2: Convert to fraction form
    646,860.72/970,478.28 = 267,711.48/x
  3. Step 3: Cross multiply
    646,860.72x = 970,478.28 × 267,711.48
  4. Step 4: Simplify right side
    646,860.72x = 259,808,176,646.65
  5. Step 5: Solve for x
    x = 259,808,176,646.65/646,860.72
  6. Step 6: Final answer
    x = 401,644.70

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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.