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Finding the Fourth Proportional to 163.04, 242.90 and 155.30

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Solution

The fourth proportional to 163.04, 242.90 and 155.30 is: 231.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.04 : 242.90 = 155.30 : x
  2. Step 2: Convert to fraction form
    163.04/242.90 = 155.30/x
  3. Step 3: Cross multiply
    163.04x = 242.90 × 155.30
  4. Step 4: Simplify right side
    163.04x = 37,720.38
  5. Step 5: Solve for x
    x = 37,720.38/163.04
  6. Step 6: Final answer
    x = 231.36

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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.