Home / 2,230.11-3,076.86-1,390.53

Finding the Fourth Proportional to 2,230.11, 3,076.86 and 1,390.53

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Solution

The fourth proportional to 2,230.11, 3,076.86 and 1,390.53 is: 1,918.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,230.11 : 3,076.86 = 1,390.53 : x
  2. Step 2: Convert to fraction form
    2,230.11/3,076.86 = 1,390.53/x
  3. Step 3: Cross multiply
    2,230.11x = 3,076.86 × 1,390.53
  4. Step 4: Simplify right side
    2,230.11x = 4,278,466.14
  5. Step 5: Solve for x
    x = 4,278,466.14/2,230.11
  6. Step 6: Final answer
    x = 1,918.50

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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.