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Finding the Fourth Proportional to 233.04, 321.04 and 155.28

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Solution

The fourth proportional to 233.04, 321.04 and 155.28 is: 213.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    233.04 : 321.04 = 155.28 : x
  2. Step 2: Convert to fraction form
    233.04/321.04 = 155.28/x
  3. Step 3: Cross multiply
    233.04x = 321.04 × 155.28
  4. Step 4: Simplify right side
    233.04x = 49,851.09
  5. Step 5: Solve for x
    x = 49,851.09/233.04
  6. Step 6: Final answer
    x = 213.92

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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.