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Finding the Fourth Proportional to 1,008.24, 1,391.38 and 560.12

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Solution

The fourth proportional to 1,008.24, 1,391.38 and 560.12 is: 772.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.24 : 1,391.38 = 560.12 : x
  2. Step 2: Convert to fraction form
    1,008.24/1,391.38 = 560.12/x
  3. Step 3: Cross multiply
    1,008.24x = 1,391.38 × 560.12
  4. Step 4: Simplify right side
    1,008.24x = 779,339.23
  5. Step 5: Solve for x
    x = 779,339.23/1,008.24
  6. Step 6: Final answer
    x = 772.97

Related Problems

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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.