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Finding the Fourth Proportional to 162.81, 243.07 and 153.09

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Solution

The fourth proportional to 162.81, 243.07 and 153.09 is: 228.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.81 : 243.07 = 153.09 : x
  2. Step 2: Convert to fraction form
    162.81/243.07 = 153.09/x
  3. Step 3: Cross multiply
    162.81x = 243.07 × 153.09
  4. Step 4: Simplify right side
    162.81x = 37,211.20
  5. Step 5: Solve for x
    x = 37,211.20/162.81
  6. Step 6: Final answer
    x = 228.56

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.