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Finding the Fourth Proportional to 3,251.71, 4,877.05 and 911.47

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Solution

The fourth proportional to 3,251.71, 4,877.05 and 911.47 is: 1,367.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,251.71 : 4,877.05 = 911.47 : x
  2. Step 2: Convert to fraction form
    3,251.71/4,877.05 = 911.47/x
  3. Step 3: Cross multiply
    3,251.71x = 4,877.05 × 911.47
  4. Step 4: Simplify right side
    3,251.71x = 4,445,284.76
  5. Step 5: Solve for x
    x = 4,445,284.76/3,251.71
  6. Step 6: Final answer
    x = 1,367.06

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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.