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Finding the Fourth Proportional to 1,015.50, 1,523.52 and 438.24

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Solution

The fourth proportional to 1,015.50, 1,523.52 and 438.24 is: 657.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.50 : 1,523.52 = 438.24 : x
  2. Step 2: Convert to fraction form
    1,015.50/1,523.52 = 438.24/x
  3. Step 3: Cross multiply
    1,015.50x = 1,523.52 × 438.24
  4. Step 4: Simplify right side
    1,015.50x = 667,667.40
  5. Step 5: Solve for x
    x = 667,667.40/1,015.50
  6. Step 6: Final answer
    x = 657.48

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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.