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Finding the Fourth Proportional to 356.01, 533.97 and 139.74

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Solution

The fourth proportional to 356.01, 533.97 and 139.74 is: 209.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.01 : 533.97 = 139.74 : x
  2. Step 2: Convert to fraction form
    356.01/533.97 = 139.74/x
  3. Step 3: Cross multiply
    356.01x = 533.97 × 139.74
  4. Step 4: Simplify right side
    356.01x = 74,616.97
  5. Step 5: Solve for x
    x = 74,616.97/356.01
  6. Step 6: Final answer
    x = 209.59

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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.