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Finding the Fourth Proportional to 353.94, 531.28 and 171.45

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Solution

The fourth proportional to 353.94, 531.28 and 171.45 is: 257.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.94 : 531.28 = 171.45 : x
  2. Step 2: Convert to fraction form
    353.94/531.28 = 171.45/x
  3. Step 3: Cross multiply
    353.94x = 531.28 × 171.45
  4. Step 4: Simplify right side
    353.94x = 91,088.17
  5. Step 5: Solve for x
    x = 91,088.17/353.94
  6. Step 6: Final answer
    x = 257.36

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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.