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Finding the Fourth Proportional to 261.58, 360.62 and 217.16

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Solution

The fourth proportional to 261.58, 360.62 and 217.16 is: 299.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.58 : 360.62 = 217.16 : x
  2. Step 2: Convert to fraction form
    261.58/360.62 = 217.16/x
  3. Step 3: Cross multiply
    261.58x = 360.62 × 217.16
  4. Step 4: Simplify right side
    261.58x = 78,312.24
  5. Step 5: Solve for x
    x = 78,312.24/261.58
  6. Step 6: Final answer
    x = 299.38

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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.