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Finding the Fourth Proportional to 294.23, 408.76 and 291.55

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Solution

The fourth proportional to 294.23, 408.76 and 291.55 is: 405.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.23 : 408.76 = 291.55 : x
  2. Step 2: Convert to fraction form
    294.23/408.76 = 291.55/x
  3. Step 3: Cross multiply
    294.23x = 408.76 × 291.55
  4. Step 4: Simplify right side
    294.23x = 119,172.99
  5. Step 5: Solve for x
    x = 119,172.99/294.23
  6. Step 6: Final answer
    x = 405.04

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.