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Finding the Fourth Proportional to 423.31, 584.31 and 290.60

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Solution

The fourth proportional to 423.31, 584.31 and 290.60 is: 401.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.31 : 584.31 = 290.60 : x
  2. Step 2: Convert to fraction form
    423.31/584.31 = 290.60/x
  3. Step 3: Cross multiply
    423.31x = 584.31 × 290.60
  4. Step 4: Simplify right side
    423.31x = 169,800.49
  5. Step 5: Solve for x
    x = 169,800.49/423.31
  6. Step 6: Final answer
    x = 401.13

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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.