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Finding the Fourth Proportional to 1,334.19, 1,840.37 and 861.33

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Solution

The fourth proportional to 1,334.19, 1,840.37 and 861.33 is: 1,188.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,334.19 : 1,840.37 = 861.33 : x
  2. Step 2: Convert to fraction form
    1,334.19/1,840.37 = 861.33/x
  3. Step 3: Cross multiply
    1,334.19x = 1,840.37 × 861.33
  4. Step 4: Simplify right side
    1,334.19x = 1,585,165.89
  5. Step 5: Solve for x
    x = 1,585,165.89/1,334.19
  6. Step 6: Final answer
    x = 1,188.11

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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.