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Finding the Fourth Proportional to 890.53, 1,229.38 and 610.88

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Solution

The fourth proportional to 890.53, 1,229.38 and 610.88 is: 843.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.53 : 1,229.38 = 610.88 : x
  2. Step 2: Convert to fraction form
    890.53/1,229.38 = 610.88/x
  3. Step 3: Cross multiply
    890.53x = 1,229.38 × 610.88
  4. Step 4: Simplify right side
    890.53x = 750,995.98
  5. Step 5: Solve for x
    x = 750,995.98/890.53
  6. Step 6: Final answer
    x = 843.32

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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.