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Finding the Fourth Proportional to 1,308.41, 1,806.78 and 976.26

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Solution

The fourth proportional to 1,308.41, 1,806.78 and 976.26 is: 1,348.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,308.41 : 1,806.78 = 976.26 : x
  2. Step 2: Convert to fraction form
    1,308.41/1,806.78 = 976.26/x
  3. Step 3: Cross multiply
    1,308.41x = 1,806.78 × 976.26
  4. Step 4: Simplify right side
    1,308.41x = 1,763,887.04
  5. Step 5: Solve for x
    x = 1,763,887.04/1,308.41
  6. Step 6: Final answer
    x = 1,348.11

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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.