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Finding the Fourth Proportional to 1,049.49, 1,572.92 and 919.18

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Solution

The fourth proportional to 1,049.49, 1,572.92 and 919.18 is: 1,377.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,049.49 : 1,572.92 = 919.18 : x
  2. Step 2: Convert to fraction form
    1,049.49/1,572.92 = 919.18/x
  3. Step 3: Cross multiply
    1,049.49x = 1,572.92 × 919.18
  4. Step 4: Simplify right side
    1,049.49x = 1,445,796.61
  5. Step 5: Solve for x
    x = 1,445,796.61/1,049.49
  6. Step 6: Final answer
    x = 1,377.62

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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.