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Finding the Fourth Proportional to 1,279.33, 1,765.61 and 837.48

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Solution

The fourth proportional to 1,279.33, 1,765.61 and 837.48 is: 1,155.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.33 : 1,765.61 = 837.48 : x
  2. Step 2: Convert to fraction form
    1,279.33/1,765.61 = 837.48/x
  3. Step 3: Cross multiply
    1,279.33x = 1,765.61 × 837.48
  4. Step 4: Simplify right side
    1,279.33x = 1,478,663.06
  5. Step 5: Solve for x
    x = 1,478,663.06/1,279.33
  6. Step 6: Final answer
    x = 1,155.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.