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Finding the Fourth Proportional to 315.32, 434.94 and 197.32

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Solution

The fourth proportional to 315.32, 434.94 and 197.32 is: 272.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.32 : 434.94 = 197.32 : x
  2. Step 2: Convert to fraction form
    315.32/434.94 = 197.32/x
  3. Step 3: Cross multiply
    315.32x = 434.94 × 197.32
  4. Step 4: Simplify right side
    315.32x = 85,822.36
  5. Step 5: Solve for x
    x = 85,822.36/315.32
  6. Step 6: Final answer
    x = 272.18

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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.