Home / 2,928.10-4,040.79-1,808.78

Finding the Fourth Proportional to 2,928.10, 4,040.79 and 1,808.78

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Solution

The fourth proportional to 2,928.10, 4,040.79 and 1,808.78 is: 2,496.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,928.10 : 4,040.79 = 1,808.78 : x
  2. Step 2: Convert to fraction form
    2,928.10/4,040.79 = 1,808.78/x
  3. Step 3: Cross multiply
    2,928.10x = 4,040.79 × 1,808.78
  4. Step 4: Simplify right side
    2,928.10x = 7,308,900.14
  5. Step 5: Solve for x
    x = 7,308,900.14/2,928.10
  6. Step 6: Final answer
    x = 2,496.12

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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.