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Finding the Fourth Proportional to 261.73, 360.91 and 187.01

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Solution

The fourth proportional to 261.73, 360.91 and 187.01 is: 257.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.73 : 360.91 = 187.01 : x
  2. Step 2: Convert to fraction form
    261.73/360.91 = 187.01/x
  3. Step 3: Cross multiply
    261.73x = 360.91 × 187.01
  4. Step 4: Simplify right side
    261.73x = 67,492.51
  5. Step 5: Solve for x
    x = 67,492.51/261.73
  6. Step 6: Final answer
    x = 257.87

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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.