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Finding the Fourth Proportional to 283.82, 425.75 and 139.50

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Solution

The fourth proportional to 283.82, 425.75 and 139.50 is: 209.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.82 : 425.75 = 139.50 : x
  2. Step 2: Convert to fraction form
    283.82/425.75 = 139.50/x
  3. Step 3: Cross multiply
    283.82x = 425.75 × 139.50
  4. Step 4: Simplify right side
    283.82x = 59,391.43
  5. Step 5: Solve for x
    x = 59,391.43/283.82
  6. Step 6: Final answer
    x = 209.26

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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.