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Finding the Fourth Proportional to 240.71, 360.45 and 172.67

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Solution

The fourth proportional to 240.71, 360.45 and 172.67 is: 258.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.71 : 360.45 = 172.67 : x
  2. Step 2: Convert to fraction form
    240.71/360.45 = 172.67/x
  3. Step 3: Cross multiply
    240.71x = 360.45 × 172.67
  4. Step 4: Simplify right side
    240.71x = 62,237.10
  5. Step 5: Solve for x
    x = 62,237.10/240.71
  6. Step 6: Final answer
    x = 258.56

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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.