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Finding the Fourth Proportional to 255.61, 381.11 and 252.91

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Solution

The fourth proportional to 255.61, 381.11 and 252.91 is: 377.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.61 : 381.11 = 252.91 : x
  2. Step 2: Convert to fraction form
    255.61/381.11 = 252.91/x
  3. Step 3: Cross multiply
    255.61x = 381.11 × 252.91
  4. Step 4: Simplify right side
    255.61x = 96,386.53
  5. Step 5: Solve for x
    x = 96,386.53/255.61
  6. Step 6: Final answer
    x = 377.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.