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Finding the Fourth Proportional to 1,100.38, 1,518.44 and 658.28

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Solution

The fourth proportional to 1,100.38, 1,518.44 and 658.28 is: 908.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,100.38 : 1,518.44 = 658.28 : x
  2. Step 2: Convert to fraction form
    1,100.38/1,518.44 = 658.28/x
  3. Step 3: Cross multiply
    1,100.38x = 1,518.44 × 658.28
  4. Step 4: Simplify right side
    1,100.38x = 999,564.13
  5. Step 5: Solve for x
    x = 999,564.13/1,100.38
  6. Step 6: Final answer
    x = 908.38

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1.5x scale

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.