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Finding the Fourth Proportional to 285.55, 425.90 and 250.92

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Solution

The fourth proportional to 285.55, 425.90 and 250.92 is: 374.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.55 : 425.90 = 250.92 : x
  2. Step 2: Convert to fraction form
    285.55/425.90 = 250.92/x
  3. Step 3: Cross multiply
    285.55x = 425.90 × 250.92
  4. Step 4: Simplify right side
    285.55x = 106,867.46
  5. Step 5: Solve for x
    x = 106,867.46/285.55
  6. Step 6: Final answer
    x = 374.25

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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.