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Finding the Fourth Proportional to 560.82, 773.90 and 308.76

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Solution

The fourth proportional to 560.82, 773.90 and 308.76 is: 426.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.82 : 773.90 = 308.76 : x
  2. Step 2: Convert to fraction form
    560.82/773.90 = 308.76/x
  3. Step 3: Cross multiply
    560.82x = 773.90 × 308.76
  4. Step 4: Simplify right side
    560.82x = 238,949.36
  5. Step 5: Solve for x
    x = 238,949.36/560.82
  6. Step 6: Final answer
    x = 426.07

Related Problems

Find fourth proportional to 280.41, 386.95 and 154.38
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.