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Finding the Fourth Proportional to 285.71, 394.00 and 254.93

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Solution

The fourth proportional to 285.71, 394.00 and 254.93 is: 351.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.71 : 394.00 = 254.93 : x
  2. Step 2: Convert to fraction form
    285.71/394.00 = 254.93/x
  3. Step 3: Cross multiply
    285.71x = 394.00 × 254.93
  4. Step 4: Simplify right side
    285.71x = 100,439.81
  5. Step 5: Solve for x
    x = 100,439.81/285.71
  6. Step 6: Final answer
    x = 351.55

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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.