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Finding the Fourth Proportional to 156.18, 217.04 and 154.51

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Solution

The fourth proportional to 156.18, 217.04 and 154.51 is: 214.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.18 : 217.04 = 154.51 : x
  2. Step 2: Convert to fraction form
    156.18/217.04 = 154.51/x
  3. Step 3: Cross multiply
    156.18x = 217.04 × 154.51
  4. Step 4: Simplify right side
    156.18x = 33,534.85
  5. Step 5: Solve for x
    x = 33,534.85/156.18
  6. Step 6: Final answer
    x = 214.72

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.