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Finding the Fourth Proportional to 162.99, 242.82 and 155.25

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Solution

The fourth proportional to 162.99, 242.82 and 155.25 is: 231.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.99 : 242.82 = 155.25 : x
  2. Step 2: Convert to fraction form
    162.99/242.82 = 155.25/x
  3. Step 3: Cross multiply
    162.99x = 242.82 × 155.25
  4. Step 4: Simplify right side
    162.99x = 37,697.81
  5. Step 5: Solve for x
    x = 37,697.81/162.99
  6. Step 6: Final answer
    x = 231.29

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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.