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Finding the Fourth Proportional to 423.04, 581.28 and 353.92

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Solution

The fourth proportional to 423.04, 581.28 and 353.92 is: 486.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.04 : 581.28 = 353.92 : x
  2. Step 2: Convert to fraction form
    423.04/581.28 = 353.92/x
  3. Step 3: Cross multiply
    423.04x = 581.28 × 353.92
  4. Step 4: Simplify right side
    423.04x = 205,726.62
  5. Step 5: Solve for x
    x = 205,726.62/423.04
  6. Step 6: Final answer
    x = 486.31

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.