Home / 2,290.28-3,159-1,405.96

Finding the Fourth Proportional to 2,290.28, 3,159 and 1,405.96

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Solution

The fourth proportional to 2,290.28, 3,159 and 1,405.96 is: 1,939.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,290.28 : 3,159 = 1,405.96 : x
  2. Step 2: Convert to fraction form
    2,290.28/3,159 = 1,405.96/x
  3. Step 3: Cross multiply
    2,290.28x = 3,159 × 1,405.96
  4. Step 4: Simplify right side
    2,290.28x = 4,441,419.74
  5. Step 5: Solve for x
    x = 4,441,419.74/2,290.28
  6. Step 6: Final answer
    x = 1,939.25

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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.