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Finding the Fourth Proportional to 356.73, 535.18 and 140.31

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Solution

The fourth proportional to 356.73, 535.18 and 140.31 is: 210.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.73 : 535.18 = 140.31 : x
  2. Step 2: Convert to fraction form
    356.73/535.18 = 140.31/x
  3. Step 3: Cross multiply
    356.73x = 535.18 × 140.31
  4. Step 4: Simplify right side
    356.73x = 75,091.11
  5. Step 5: Solve for x
    x = 75,091.11/356.73
  6. Step 6: Final answer
    x = 210.50

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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.