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Finding the Fourth Proportional to 560.79, 841.19 and 331.28

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Solution

The fourth proportional to 560.79, 841.19 and 331.28 is: 496.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.79 : 841.19 = 331.28 : x
  2. Step 2: Convert to fraction form
    560.79/841.19 = 331.28/x
  3. Step 3: Cross multiply
    560.79x = 841.19 × 331.28
  4. Step 4: Simplify right side
    560.79x = 278,663.56
  5. Step 5: Solve for x
    x = 278,663.56/560.79
  6. Step 6: Final answer
    x = 496.91

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Double scale
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Similar ratio
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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.