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Finding the Fourth Proportional to 283.17, 390.69 and 165.12

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Solution

The fourth proportional to 283.17, 390.69 and 165.12 is: 227.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.17 : 390.69 = 165.12 : x
  2. Step 2: Convert to fraction form
    283.17/390.69 = 165.12/x
  3. Step 3: Cross multiply
    283.17x = 390.69 × 165.12
  4. Step 4: Simplify right side
    283.17x = 64,510.73
  5. Step 5: Solve for x
    x = 64,510.73/283.17
  6. Step 6: Final answer
    x = 227.82

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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.