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Finding the Fourth Proportional to 315.32, 434.74 and 245.26

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Solution

The fourth proportional to 315.32, 434.74 and 245.26 is: 338.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.32 : 434.74 = 245.26 : x
  2. Step 2: Convert to fraction form
    315.32/434.74 = 245.26/x
  3. Step 3: Cross multiply
    315.32x = 434.74 × 245.26
  4. Step 4: Simplify right side
    315.32x = 106,624.33
  5. Step 5: Solve for x
    x = 106,624.33/315.32
  6. Step 6: Final answer
    x = 338.15

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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.