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Finding the Fourth Proportional to 291.41, 437.06 and 85.93

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Solution

The fourth proportional to 291.41, 437.06 and 85.93 is: 128.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.41 : 437.06 = 85.93 : x
  2. Step 2: Convert to fraction form
    291.41/437.06 = 85.93/x
  3. Step 3: Cross multiply
    291.41x = 437.06 × 85.93
  4. Step 4: Simplify right side
    291.41x = 37,555.69
  5. Step 5: Solve for x
    x = 37,555.69/291.41
  6. Step 6: Final answer
    x = 128.88

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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.