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Finding the Fourth Proportional to 1,765.43, 2,436.36 and 979.47

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Solution

The fourth proportional to 1,765.43, 2,436.36 and 979.47 is: 1,351.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,765.43 : 2,436.36 = 979.47 : x
  2. Step 2: Convert to fraction form
    1,765.43/2,436.36 = 979.47/x
  3. Step 3: Cross multiply
    1,765.43x = 2,436.36 × 979.47
  4. Step 4: Simplify right side
    1,765.43x = 2,386,341.53
  5. Step 5: Solve for x
    x = 2,386,341.53/1,765.43
  6. Step 6: Final answer
    x = 1,351.71

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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.