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Finding the Fourth Proportional to 1,523.95, 2,286.06 and 428.33

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Solution

The fourth proportional to 1,523.95, 2,286.06 and 428.33 is: 642.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,523.95 : 2,286.06 = 428.33 : x
  2. Step 2: Convert to fraction form
    1,523.95/2,286.06 = 428.33/x
  3. Step 3: Cross multiply
    1,523.95x = 2,286.06 × 428.33
  4. Step 4: Simplify right side
    1,523.95x = 979,179.33
  5. Step 5: Solve for x
    x = 979,179.33/1,523.95
  6. Step 6: Final answer
    x = 642.53

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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.