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Finding the Fourth Proportional to 495.19, 742.65 and 170.47

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Solution

The fourth proportional to 495.19, 742.65 and 170.47 is: 255.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.19 : 742.65 = 170.47 : x
  2. Step 2: Convert to fraction form
    495.19/742.65 = 170.47/x
  3. Step 3: Cross multiply
    495.19x = 742.65 × 170.47
  4. Step 4: Simplify right side
    495.19x = 126,599.55
  5. Step 5: Solve for x
    x = 126,599.55/495.19
  6. Step 6: Final answer
    x = 255.66

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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.