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Finding the Fourth Proportional to 1,047.61, 1,572.43 and 798.48

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Solution

The fourth proportional to 1,047.61, 1,572.43 and 798.48 is: 1,198.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,047.61 : 1,572.43 = 798.48 : x
  2. Step 2: Convert to fraction form
    1,047.61/1,572.43 = 798.48/x
  3. Step 3: Cross multiply
    1,047.61x = 1,572.43 × 798.48
  4. Step 4: Simplify right side
    1,047.61x = 1,255,553.91
  5. Step 5: Solve for x
    x = 1,255,553.91/1,047.61
  6. Step 6: Final answer
    x = 1,198.49

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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.