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Finding the Fourth Proportional to 1,367.92, 1,887.48 and 976.66

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Solution

The fourth proportional to 1,367.92, 1,887.48 and 976.66 is: 1,347.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,367.92 : 1,887.48 = 976.66 : x
  2. Step 2: Convert to fraction form
    1,367.92/1,887.48 = 976.66/x
  3. Step 3: Cross multiply
    1,367.92x = 1,887.48 × 976.66
  4. Step 4: Simplify right side
    1,367.92x = 1,843,426.22
  5. Step 5: Solve for x
    x = 1,843,426.22/1,367.92
  6. Step 6: Final answer
    x = 1,347.61

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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.