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Finding the Fourth Proportional to 261.60, 360.80 and 158.08

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Solution

The fourth proportional to 261.60, 360.80 and 158.08 is: 218.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.60 : 360.80 = 158.08 : x
  2. Step 2: Convert to fraction form
    261.60/360.80 = 158.08/x
  3. Step 3: Cross multiply
    261.60x = 360.80 × 158.08
  4. Step 4: Simplify right side
    261.60x = 57,035.26
  5. Step 5: Solve for x
    x = 57,035.26/261.60
  6. Step 6: Final answer
    x = 218.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.