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Finding the Fourth Proportional to 353.95, 531.16 and 137.53

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Solution

The fourth proportional to 353.95, 531.16 and 137.53 is: 206.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.95 : 531.16 = 137.53 : x
  2. Step 2: Convert to fraction form
    353.95/531.16 = 137.53/x
  3. Step 3: Cross multiply
    353.95x = 531.16 × 137.53
  4. Step 4: Simplify right side
    353.95x = 73,050.75
  5. Step 5: Solve for x
    x = 73,050.75/353.95
  6. Step 6: Final answer
    x = 206.39

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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.