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Finding the Fourth Proportional to 315.05, 434.80 and 175.18

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Solution

The fourth proportional to 315.05, 434.80 and 175.18 is: 241.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.05 : 434.80 = 175.18 : x
  2. Step 2: Convert to fraction form
    315.05/434.80 = 175.18/x
  3. Step 3: Cross multiply
    315.05x = 434.80 × 175.18
  4. Step 4: Simplify right side
    315.05x = 76,167.39
  5. Step 5: Solve for x
    x = 76,167.39/315.05
  6. Step 6: Final answer
    x = 241.76

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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.