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Finding the Fourth Proportional to 1,073.92, 1,603.70 and 918.22

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Solution

The fourth proportional to 1,073.92, 1,603.70 and 918.22 is: 1,371.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,073.92 : 1,603.70 = 918.22 : x
  2. Step 2: Convert to fraction form
    1,073.92/1,603.70 = 918.22/x
  3. Step 3: Cross multiply
    1,073.92x = 1,603.70 × 918.22
  4. Step 4: Simplify right side
    1,073.92x = 1,472,549.41
  5. Step 5: Solve for x
    x = 1,472,549.41/1,073.92
  6. Step 6: Final answer
    x = 1,371.19

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.