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Finding the Fourth Proportional to 1,154.75, 1,593.56 and 630.78

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Solution

The fourth proportional to 1,154.75, 1,593.56 and 630.78 is: 870.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,154.75 : 1,593.56 = 630.78 : x
  2. Step 2: Convert to fraction form
    1,154.75/1,593.56 = 630.78/x
  3. Step 3: Cross multiply
    1,154.75x = 1,593.56 × 630.78
  4. Step 4: Simplify right side
    1,154.75x = 1,005,182.62
  5. Step 5: Solve for x
    x = 1,005,182.62/1,154.75
  6. Step 6: Final answer
    x = 870.48

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.