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Finding the Fourth Proportional to 353.16, 487.37 and 193.66

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Solution

The fourth proportional to 353.16, 487.37 and 193.66 is: 267.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.16 : 487.37 = 193.66 : x
  2. Step 2: Convert to fraction form
    353.16/487.37 = 193.66/x
  3. Step 3: Cross multiply
    353.16x = 487.37 × 193.66
  4. Step 4: Simplify right side
    353.16x = 94,382.12
  5. Step 5: Solve for x
    x = 94,382.12/353.16
  6. Step 6: Final answer
    x = 267.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.