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Finding the Fourth Proportional to 381.04, 525.34 and 310.97

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Solution

The fourth proportional to 381.04, 525.34 and 310.97 is: 428.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.04 : 525.34 = 310.97 : x
  2. Step 2: Convert to fraction form
    381.04/525.34 = 310.97/x
  3. Step 3: Cross multiply
    381.04x = 525.34 × 310.97
  4. Step 4: Simplify right side
    381.04x = 163,364.93
  5. Step 5: Solve for x
    x = 163,364.93/381.04
  6. Step 6: Final answer
    x = 428.74

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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.