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Finding the Fourth Proportional to 235.60, 353.13 and 139.12

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Solution

The fourth proportional to 235.60, 353.13 and 139.12 is: 208.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.60 : 353.13 = 139.12 : x
  2. Step 2: Convert to fraction form
    235.60/353.13 = 139.12/x
  3. Step 3: Cross multiply
    235.60x = 353.13 × 139.12
  4. Step 4: Simplify right side
    235.60x = 49,127.45
  5. Step 5: Solve for x
    x = 49,127.45/235.60
  6. Step 6: Final answer
    x = 208.52

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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.