Home / 2,890.11-3,988.33-1,563.81

Finding the Fourth Proportional to 2,890.11, 3,988.33 and 1,563.81

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Solution

The fourth proportional to 2,890.11, 3,988.33 and 1,563.81 is: 2,158.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.11 : 3,988.33 = 1,563.81 : x
  2. Step 2: Convert to fraction form
    2,890.11/3,988.33 = 1,563.81/x
  3. Step 3: Cross multiply
    2,890.11x = 3,988.33 × 1,563.81
  4. Step 4: Simplify right side
    2,890.11x = 6,236,990.34
  5. Step 5: Solve for x
    x = 6,236,990.34/2,890.11
  6. Step 6: Final answer
    x = 2,158.05

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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.