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Finding the Fourth Proportional to 315.20, 434.57 and 232.16

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Solution

The fourth proportional to 315.20, 434.57 and 232.16 is: 320.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.20 : 434.57 = 232.16 : x
  2. Step 2: Convert to fraction form
    315.20/434.57 = 232.16/x
  3. Step 3: Cross multiply
    315.20x = 434.57 × 232.16
  4. Step 4: Simplify right side
    315.20x = 100,886.44
  5. Step 5: Solve for x
    x = 100,886.44/315.20
  6. Step 6: Final answer
    x = 320.08

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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.