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Finding the Fourth Proportional to 162.34, 242.22 and 145.90

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Solution

The fourth proportional to 162.34, 242.22 and 145.90 is: 217.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.34 : 242.22 = 145.90 : x
  2. Step 2: Convert to fraction form
    162.34/242.22 = 145.90/x
  3. Step 3: Cross multiply
    162.34x = 242.22 × 145.90
  4. Step 4: Simplify right side
    162.34x = 35,340.75
  5. Step 5: Solve for x
    x = 35,340.75/162.34
  6. Step 6: Final answer
    x = 217.70

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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.