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Finding the Fourth Proportional to 261.08, 390.97 and 158.41

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Solution

The fourth proportional to 261.08, 390.97 and 158.41 is: 237.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.08 : 390.97 = 158.41 : x
  2. Step 2: Convert to fraction form
    261.08/390.97 = 158.41/x
  3. Step 3: Cross multiply
    261.08x = 390.97 × 158.41
  4. Step 4: Simplify right side
    261.08x = 61,933.56
  5. Step 5: Solve for x
    x = 61,933.56/261.08
  6. Step 6: Final answer
    x = 237.22

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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.