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Finding the Fourth Proportional to 353.19, 529.65 and 136.65

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Solution

The fourth proportional to 353.19, 529.65 and 136.65 is: 204.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.19 : 529.65 = 136.65 : x
  2. Step 2: Convert to fraction form
    353.19/529.65 = 136.65/x
  3. Step 3: Cross multiply
    353.19x = 529.65 × 136.65
  4. Step 4: Simplify right side
    353.19x = 72,376.67
  5. Step 5: Solve for x
    x = 72,376.67/353.19
  6. Step 6: Final answer
    x = 204.92

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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.