Home / 2,890.75-3,988.24-1,631.65

Finding the Fourth Proportional to 2,890.75, 3,988.24 and 1,631.65

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Solution

The fourth proportional to 2,890.75, 3,988.24 and 1,631.65 is: 2,251.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.75 : 3,988.24 = 1,631.65 : x
  2. Step 2: Convert to fraction form
    2,890.75/3,988.24 = 1,631.65/x
  3. Step 3: Cross multiply
    2,890.75x = 3,988.24 × 1,631.65
  4. Step 4: Simplify right side
    2,890.75x = 6,507,411.80
  5. Step 5: Solve for x
    x = 6,507,411.80/2,890.75
  6. Step 6: Final answer
    x = 2,251.12

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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.