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Finding the Fourth Proportional to 162.48, 224.28 and 157.68

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Solution

The fourth proportional to 162.48, 224.28 and 157.68 is: 217.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.48 : 224.28 = 157.68 : x
  2. Step 2: Convert to fraction form
    162.48/224.28 = 157.68/x
  3. Step 3: Cross multiply
    162.48x = 224.28 × 157.68
  4. Step 4: Simplify right side
    162.48x = 35,364.47
  5. Step 5: Solve for x
    x = 35,364.47/162.48
  6. Step 6: Final answer
    x = 217.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.