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Finding the Fourth Proportional to 283.12, 424.60 and 120.79

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Solution

The fourth proportional to 283.12, 424.60 and 120.79 is: 181.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.12 : 424.60 = 120.79 : x
  2. Step 2: Convert to fraction form
    283.12/424.60 = 120.79/x
  3. Step 3: Cross multiply
    283.12x = 424.60 × 120.79
  4. Step 4: Simplify right side
    283.12x = 51,287.43
  5. Step 5: Solve for x
    x = 51,287.43/283.12
  6. Step 6: Final answer
    x = 181.15

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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.