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Finding the Fourth Proportional to 283.90, 425.94 and 243.40

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Solution

The fourth proportional to 283.90, 425.94 and 243.40 is: 365.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.90 : 425.94 = 243.40 : x
  2. Step 2: Convert to fraction form
    283.90/425.94 = 243.40/x
  3. Step 3: Cross multiply
    283.90x = 425.94 × 243.40
  4. Step 4: Simplify right side
    283.90x = 103,673.80
  5. Step 5: Solve for x
    x = 103,673.80/283.90
  6. Step 6: Final answer
    x = 365.18

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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.