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Finding the Fourth Proportional to 354.18, 531.27 and 180.90

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Solution

The fourth proportional to 354.18, 531.27 and 180.90 is: 271.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.18 : 531.27 = 180.90 : x
  2. Step 2: Convert to fraction form
    354.18/531.27 = 180.90/x
  3. Step 3: Cross multiply
    354.18x = 531.27 × 180.90
  4. Step 4: Simplify right side
    354.18x = 96,106.74
  5. Step 5: Solve for x
    x = 96,106.74/354.18
  6. Step 6: Final answer
    x = 271.35

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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.