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Finding the Fourth Proportional to 1,044.64, 1,565.73 and 428.04

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Solution

The fourth proportional to 1,044.64, 1,565.73 and 428.04 is: 641.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,044.64 : 1,565.73 = 428.04 : x
  2. Step 2: Convert to fraction form
    1,044.64/1,565.73 = 428.04/x
  3. Step 3: Cross multiply
    1,044.64x = 1,565.73 × 428.04
  4. Step 4: Simplify right side
    1,044.64x = 670,195.07
  5. Step 5: Solve for x
    x = 670,195.07/1,044.64
  6. Step 6: Final answer
    x = 641.56

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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.