Home / 2,890.28-3,988.61-1,631.35

Finding the Fourth Proportional to 2,890.28, 3,988.61 and 1,631.35

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Solution

The fourth proportional to 2,890.28, 3,988.61 and 1,631.35 is: 2,251.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.28 : 3,988.61 = 1,631.35 : x
  2. Step 2: Convert to fraction form
    2,890.28/3,988.61 = 1,631.35/x
  3. Step 3: Cross multiply
    2,890.28x = 3,988.61 × 1,631.35
  4. Step 4: Simplify right side
    2,890.28x = 6,506,818.92
  5. Step 5: Solve for x
    x = 6,506,818.92/2,890.28
  6. Step 6: Final answer
    x = 2,251.28

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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.