Home / 1,187.25-1,636.65-976.92

Finding the Fourth Proportional to 1,187.25, 1,636.65 and 976.92

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Solution

The fourth proportional to 1,187.25, 1,636.65 and 976.92 is: 1,346.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187.25 : 1,636.65 = 976.92 : x
  2. Step 2: Convert to fraction form
    1,187.25/1,636.65 = 976.92/x
  3. Step 3: Cross multiply
    1,187.25x = 1,636.65 × 976.92
  4. Step 4: Simplify right side
    1,187.25x = 1,598,876.12
  5. Step 5: Solve for x
    x = 1,598,876.12/1,187.25
  6. Step 6: Final answer
    x = 1,346.71

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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.