Home / 2,281.55-3,422.45-638.09

Finding the Fourth Proportional to 2,281.55, 3,422.45 and 638.09

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Solution

The fourth proportional to 2,281.55, 3,422.45 and 638.09 is: 957.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,281.55 : 3,422.45 = 638.09 : x
  2. Step 2: Convert to fraction form
    2,281.55/3,422.45 = 638.09/x
  3. Step 3: Cross multiply
    2,281.55x = 3,422.45 × 638.09
  4. Step 4: Simplify right side
    2,281.55x = 2,183,826.04
  5. Step 5: Solve for x
    x = 2,183,826.04/2,281.55
  6. Step 6: Final answer
    x = 957.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.