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Finding the Fourth Proportional to 423.34, 584.45 and 290.76

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Solution

The fourth proportional to 423.34, 584.45 and 290.76 is: 401.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.34 : 584.45 = 290.76 : x
  2. Step 2: Convert to fraction form
    423.34/584.45 = 290.76/x
  3. Step 3: Cross multiply
    423.34x = 584.45 × 290.76
  4. Step 4: Simplify right side
    423.34x = 169,932.13
  5. Step 5: Solve for x
    x = 169,932.13/423.34
  6. Step 6: Final answer
    x = 401.41

Related Problems

Find fourth proportional to 211.67, 292.22 and 145.38
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.