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Finding the Fourth Proportional to 1,432.95, 2,148.04 and 911.33

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Solution

The fourth proportional to 1,432.95, 2,148.04 and 911.33 is: 1,366.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432.95 : 2,148.04 = 911.33 : x
  2. Step 2: Convert to fraction form
    1,432.95/2,148.04 = 911.33/x
  3. Step 3: Cross multiply
    1,432.95x = 2,148.04 × 911.33
  4. Step 4: Simplify right side
    1,432.95x = 1,957,573.29
  5. Step 5: Solve for x
    x = 1,957,573.29/1,432.95
  6. Step 6: Final answer
    x = 1,366.11

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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.