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Finding the Fourth Proportional to 315.46, 473.73 and 171.28

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Solution

The fourth proportional to 315.46, 473.73 and 171.28 is: 257.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.46 : 473.73 = 171.28 : x
  2. Step 2: Convert to fraction form
    315.46/473.73 = 171.28/x
  3. Step 3: Cross multiply
    315.46x = 473.73 × 171.28
  4. Step 4: Simplify right side
    315.46x = 81,140.47
  5. Step 5: Solve for x
    x = 81,140.47/315.46
  6. Step 6: Final answer
    x = 257.21

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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.