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Finding the Fourth Proportional to 162.80, 245.11 and 143.66

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Solution

The fourth proportional to 162.80, 245.11 and 143.66 is: 216.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.80 : 245.11 = 143.66 : x
  2. Step 2: Convert to fraction form
    162.80/245.11 = 143.66/x
  3. Step 3: Cross multiply
    162.80x = 245.11 × 143.66
  4. Step 4: Simplify right side
    162.80x = 35,212.50
  5. Step 5: Solve for x
    x = 35,212.50/162.80
  6. Step 6: Final answer
    x = 216.29

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.