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Finding the Fourth Proportional to 401.57, 601.34 and 254.87

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Solution

The fourth proportional to 401.57, 601.34 and 254.87 is: 381.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.57 : 601.34 = 254.87 : x
  2. Step 2: Convert to fraction form
    401.57/601.34 = 254.87/x
  3. Step 3: Cross multiply
    401.57x = 601.34 × 254.87
  4. Step 4: Simplify right side
    401.57x = 153,261.50
  5. Step 5: Solve for x
    x = 153,261.50/401.57
  6. Step 6: Final answer
    x = 381.66

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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.