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Finding the Fourth Proportional to 654.55, 981.72 and 167.58

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Solution

The fourth proportional to 654.55, 981.72 and 167.58 is: 251.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.55 : 981.72 = 167.58 : x
  2. Step 2: Convert to fraction form
    654.55/981.72 = 167.58/x
  3. Step 3: Cross multiply
    654.55x = 981.72 × 167.58
  4. Step 4: Simplify right side
    654.55x = 164,516.64
  5. Step 5: Solve for x
    x = 164,516.64/654.55
  6. Step 6: Final answer
    x = 251.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.