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Finding the Fourth Proportional to 261.35, 360.08 and 172.67

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Solution

The fourth proportional to 261.35, 360.08 and 172.67 is: 237.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.35 : 360.08 = 172.67 : x
  2. Step 2: Convert to fraction form
    261.35/360.08 = 172.67/x
  3. Step 3: Cross multiply
    261.35x = 360.08 × 172.67
  4. Step 4: Simplify right side
    261.35x = 62,172.35
  5. Step 5: Solve for x
    x = 62,172.35/261.35
  6. Step 6: Final answer
    x = 237.89

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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.