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Finding the Fourth Proportional to 323.92, 486.69 and 291.70

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Solution

The fourth proportional to 323.92, 486.69 and 291.70 is: 438.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.92 : 486.69 = 291.70 : x
  2. Step 2: Convert to fraction form
    323.92/486.69 = 291.70/x
  3. Step 3: Cross multiply
    323.92x = 486.69 × 291.70
  4. Step 4: Simplify right side
    323.92x = 141,967.47
  5. Step 5: Solve for x
    x = 141,967.47/323.92
  6. Step 6: Final answer
    x = 438.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.