Home / 1,186.60-1,775.85-1,040.80

Finding the Fourth Proportional to 1,186.60, 1,775.85 and 1,040.80

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Solution

The fourth proportional to 1,186.60, 1,775.85 and 1,040.80 is: 1,557.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.60 : 1,775.85 = 1,040.80 : x
  2. Step 2: Convert to fraction form
    1,186.60/1,775.85 = 1,040.80/x
  3. Step 3: Cross multiply
    1,186.60x = 1,775.85 × 1,040.80
  4. Step 4: Simplify right side
    1,186.60x = 1,848,304.68
  5. Step 5: Solve for x
    x = 1,848,304.68/1,186.60
  6. Step 6: Final answer
    x = 1,557.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.