Home / 2,890.28-3,988.61-1,631.40

Finding the Fourth Proportional to 2,890.28, 3,988.61 and 1,631.40

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Solution

The fourth proportional to 2,890.28, 3,988.61 and 1,631.40 is: 2,251.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.28 : 3,988.61 = 1,631.40 : x
  2. Step 2: Convert to fraction form
    2,890.28/3,988.61 = 1,631.40/x
  3. Step 3: Cross multiply
    2,890.28x = 3,988.61 × 1,631.40
  4. Step 4: Simplify right side
    2,890.28x = 6,507,022.43
  5. Step 5: Solve for x
    x = 6,507,022.43/2,890.28
  6. Step 6: Final answer
    x = 2,251.35

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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.