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Finding the Fourth Proportional to 479.19, 718.38 and 170.85

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Solution

The fourth proportional to 479.19, 718.38 and 170.85 is: 256.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.19 : 718.38 = 170.85 : x
  2. Step 2: Convert to fraction form
    479.19/718.38 = 170.85/x
  3. Step 3: Cross multiply
    479.19x = 718.38 × 170.85
  4. Step 4: Simplify right side
    479.19x = 122,735.22
  5. Step 5: Solve for x
    x = 122,735.22/479.19
  6. Step 6: Final answer
    x = 256.13

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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.