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Finding the Fourth Proportional to 1,044.05, 1,565.70 and 427.43

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Solution

The fourth proportional to 1,044.05, 1,565.70 and 427.43 is: 640.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,044.05 : 1,565.70 = 427.43 : x
  2. Step 2: Convert to fraction form
    1,044.05/1,565.70 = 427.43/x
  3. Step 3: Cross multiply
    1,044.05x = 1,565.70 × 427.43
  4. Step 4: Simplify right side
    1,044.05x = 669,227.15
  5. Step 5: Solve for x
    x = 669,227.15/1,044.05
  6. Step 6: Final answer
    x = 640.99

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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.