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Finding the Fourth Proportional to 291.76, 437.67 and 215.69

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Solution

The fourth proportional to 291.76, 437.67 and 215.69 is: 323.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.76 : 437.67 = 215.69 : x
  2. Step 2: Convert to fraction form
    291.76/437.67 = 215.69/x
  3. Step 3: Cross multiply
    291.76x = 437.67 × 215.69
  4. Step 4: Simplify right side
    291.76x = 94,398.85
  5. Step 5: Solve for x
    x = 94,398.85/291.76
  6. Step 6: Final answer
    x = 323.55

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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.