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Finding the Fourth Proportional to 1,151.55, 1,724.13 and 948.56

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Solution

The fourth proportional to 1,151.55, 1,724.13 and 948.56 is: 1,420.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,151.55 : 1,724.13 = 948.56 : x
  2. Step 2: Convert to fraction form
    1,151.55/1,724.13 = 948.56/x
  3. Step 3: Cross multiply
    1,151.55x = 1,724.13 × 948.56
  4. Step 4: Simplify right side
    1,151.55x = 1,635,432.13
  5. Step 5: Solve for x
    x = 1,635,432.13/1,151.55
  6. Step 6: Final answer
    x = 1,420.20

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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.