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Finding the Fourth Proportional to 315.95, 474.12 and 179.28

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Solution

The fourth proportional to 315.95, 474.12 and 179.28 is: 269.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.95 : 474.12 = 179.28 : x
  2. Step 2: Convert to fraction form
    315.95/474.12 = 179.28/x
  3. Step 3: Cross multiply
    315.95x = 474.12 × 179.28
  4. Step 4: Simplify right side
    315.95x = 85,000.23
  5. Step 5: Solve for x
    x = 85,000.23/315.95
  6. Step 6: Final answer
    x = 269.03

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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.