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Finding the Fourth Proportional to 381.55, 525.70 and 269.46

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Solution

The fourth proportional to 381.55, 525.70 and 269.46 is: 371.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.55 : 525.70 = 269.46 : x
  2. Step 2: Convert to fraction form
    381.55/525.70 = 269.46/x
  3. Step 3: Cross multiply
    381.55x = 525.70 × 269.46
  4. Step 4: Simplify right side
    381.55x = 141,653.77
  5. Step 5: Solve for x
    x = 141,653.77/381.55
  6. Step 6: Final answer
    x = 371.26

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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.