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Finding the Fourth Proportional to 1,023.38, 1,535.27 and 438.38

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Solution

The fourth proportional to 1,023.38, 1,535.27 and 438.38 is: 657.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,023.38 : 1,535.27 = 438.38 : x
  2. Step 2: Convert to fraction form
    1,023.38/1,535.27 = 438.38/x
  3. Step 3: Cross multiply
    1,023.38x = 1,535.27 × 438.38
  4. Step 4: Simplify right side
    1,023.38x = 673,031.66
  5. Step 5: Solve for x
    x = 673,031.66/1,023.38
  6. Step 6: Final answer
    x = 657.66

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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.