Home / 2,890.28-3,988.62-1,631.22

Finding the Fourth Proportional to 2,890.28, 3,988.62 and 1,631.22

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Solution

The fourth proportional to 2,890.28, 3,988.62 and 1,631.22 is: 2,251.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.28 : 3,988.62 = 1,631.22 : x
  2. Step 2: Convert to fraction form
    2,890.28/3,988.62 = 1,631.22/x
  3. Step 3: Cross multiply
    2,890.28x = 3,988.62 × 1,631.22
  4. Step 4: Simplify right side
    2,890.28x = 6,506,316.72
  5. Step 5: Solve for x
    x = 6,506,316.72/2,890.28
  6. Step 6: Final answer
    x = 2,251.11

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1.5x scale

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.