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Finding the Fourth Proportional to 176.51, 243.05 and 155.72

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Solution

The fourth proportional to 176.51, 243.05 and 155.72 is: 214.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.51 : 243.05 = 155.72 : x
  2. Step 2: Convert to fraction form
    176.51/243.05 = 155.72/x
  3. Step 3: Cross multiply
    176.51x = 243.05 × 155.72
  4. Step 4: Simplify right side
    176.51x = 37,845.75
  5. Step 5: Solve for x
    x = 37,845.75/176.51
  6. Step 6: Final answer
    x = 214.42

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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.