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Finding the Fourth Proportional to 285.56, 427.08 and 169.72

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Solution

The fourth proportional to 285.56, 427.08 and 169.72 is: 253.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.56 : 427.08 = 169.72 : x
  2. Step 2: Convert to fraction form
    285.56/427.08 = 169.72/x
  3. Step 3: Cross multiply
    285.56x = 427.08 × 169.72
  4. Step 4: Simplify right side
    285.56x = 72,484.02
  5. Step 5: Solve for x
    x = 72,484.02/285.56
  6. Step 6: Final answer
    x = 253.83

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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.