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Finding the Fourth Proportional to 1,024.04, 1,535.34 and 639.56

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Solution

The fourth proportional to 1,024.04, 1,535.34 and 639.56 is: 958.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,024.04 : 1,535.34 = 639.56 : x
  2. Step 2: Convert to fraction form
    1,024.04/1,535.34 = 639.56/x
  3. Step 3: Cross multiply
    1,024.04x = 1,535.34 × 639.56
  4. Step 4: Simplify right side
    1,024.04x = 981,942.05
  5. Step 5: Solve for x
    x = 981,942.05/1,024.04
  6. Step 6: Final answer
    x = 958.89

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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.