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Finding the Fourth Proportional to 765.88, 1,149.06 and 253.24

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Solution

The fourth proportional to 765.88, 1,149.06 and 253.24 is: 379.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    765.88 : 1,149.06 = 253.24 : x
  2. Step 2: Convert to fraction form
    765.88/1,149.06 = 253.24/x
  3. Step 3: Cross multiply
    765.88x = 1,149.06 × 253.24
  4. Step 4: Simplify right side
    765.88x = 290,987.95
  5. Step 5: Solve for x
    x = 290,987.95/765.88
  6. Step 6: Final answer
    x = 379.94

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.