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Finding the Fourth Proportional to 1,015.50, 1,523.33 and 438.38

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Solution

The fourth proportional to 1,015.50, 1,523.33 and 438.38 is: 657.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.50 : 1,523.33 = 438.38 : x
  2. Step 2: Convert to fraction form
    1,015.50/1,523.33 = 438.38/x
  3. Step 3: Cross multiply
    1,015.50x = 1,523.33 × 438.38
  4. Step 4: Simplify right side
    1,015.50x = 667,787.60
  5. Step 5: Solve for x
    x = 667,787.60/1,015.50
  6. Step 6: Final answer
    x = 657.59

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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.