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Finding the Fourth Proportional to 1,119.62, 1,545.22 and 653.88

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Solution

The fourth proportional to 1,119.62, 1,545.22 and 653.88 is: 902.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.62 : 1,545.22 = 653.88 : x
  2. Step 2: Convert to fraction form
    1,119.62/1,545.22 = 653.88/x
  3. Step 3: Cross multiply
    1,119.62x = 1,545.22 × 653.88
  4. Step 4: Simplify right side
    1,119.62x = 1,010,388.45
  5. Step 5: Solve for x
    x = 1,010,388.45/1,119.62
  6. Step 6: Final answer
    x = 902.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.