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Finding the Fourth Proportional to 1,130.75, 1,560.17 and 658.36

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Solution

The fourth proportional to 1,130.75, 1,560.17 and 658.36 is: 908.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,130.75 : 1,560.17 = 658.36 : x
  2. Step 2: Convert to fraction form
    1,130.75/1,560.17 = 658.36/x
  3. Step 3: Cross multiply
    1,130.75x = 1,560.17 × 658.36
  4. Step 4: Simplify right side
    1,130.75x = 1,027,142.43
  5. Step 5: Solve for x
    x = 1,027,142.43/1,130.75
  6. Step 6: Final answer
    x = 908.37

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Half scale
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Double scale
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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.