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Finding the Fourth Proportional to 478.18, 717.38 and 170.06

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Solution

The fourth proportional to 478.18, 717.38 and 170.06 is: 255.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.18 : 717.38 = 170.06 : x
  2. Step 2: Convert to fraction form
    478.18/717.38 = 170.06/x
  3. Step 3: Cross multiply
    478.18x = 717.38 × 170.06
  4. Step 4: Simplify right side
    478.18x = 121,993.21
  5. Step 5: Solve for x
    x = 121,993.21/478.18
  6. Step 6: Final answer
    x = 255.12

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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.