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Finding the Fourth Proportional to 334.52, 501.78 and 139.52

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Solution

The fourth proportional to 334.52, 501.78 and 139.52 is: 209.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    334.52 : 501.78 = 139.52 : x
  2. Step 2: Convert to fraction form
    334.52/501.78 = 139.52/x
  3. Step 3: Cross multiply
    334.52x = 501.78 × 139.52
  4. Step 4: Simplify right side
    334.52x = 70,008.35
  5. Step 5: Solve for x
    x = 70,008.35/334.52
  6. Step 6: Final answer
    x = 209.28

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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.