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Finding the Fourth Proportional to 356.92, 535.07 and 140.38

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Solution

The fourth proportional to 356.92, 535.07 and 140.38 is: 210.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.92 : 535.07 = 140.38 : x
  2. Step 2: Convert to fraction form
    356.92/535.07 = 140.38/x
  3. Step 3: Cross multiply
    356.92x = 535.07 × 140.38
  4. Step 4: Simplify right side
    356.92x = 75,112.14
  5. Step 5: Solve for x
    x = 75,112.14/356.92
  6. Step 6: Final answer
    x = 210.45

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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.