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Finding the Fourth Proportional to 422.76, 583.48 and 411.66

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Solution

The fourth proportional to 422.76, 583.48 and 411.66 is: 568.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.76 : 583.48 = 411.66 : x
  2. Step 2: Convert to fraction form
    422.76/583.48 = 411.66/x
  3. Step 3: Cross multiply
    422.76x = 583.48 × 411.66
  4. Step 4: Simplify right side
    422.76x = 240,192.46
  5. Step 5: Solve for x
    x = 240,192.46/422.76
  6. Step 6: Final answer
    x = 568.15

Related Problems

Find fourth proportional to 211.38, 291.74 and 205.83
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Double scale
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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.