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Finding the Fourth Proportional to 285.29, 393.69 and 160.95

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Solution

The fourth proportional to 285.29, 393.69 and 160.95 is: 222.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.29 : 393.69 = 160.95 : x
  2. Step 2: Convert to fraction form
    285.29/393.69 = 160.95/x
  3. Step 3: Cross multiply
    285.29x = 393.69 × 160.95
  4. Step 4: Simplify right side
    285.29x = 63,366.49
  5. Step 5: Solve for x
    x = 63,366.49/285.29
  6. Step 6: Final answer
    x = 222.11

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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.