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Finding the Fourth Proportional to 381.33, 570.78 and 265.23

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Solution

The fourth proportional to 381.33, 570.78 and 265.23 is: 397.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.33 : 570.78 = 265.23 : x
  2. Step 2: Convert to fraction form
    381.33/570.78 = 265.23/x
  3. Step 3: Cross multiply
    381.33x = 570.78 × 265.23
  4. Step 4: Simplify right side
    381.33x = 151,387.98
  5. Step 5: Solve for x
    x = 151,387.98/381.33
  6. Step 6: Final answer
    x = 397.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.