Home / 2,104.20-3,156.19-643.25

Finding the Fourth Proportional to 2,104.20, 3,156.19 and 643.25

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Solution

The fourth proportional to 2,104.20, 3,156.19 and 643.25 is: 964.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,104.20 : 3,156.19 = 643.25 : x
  2. Step 2: Convert to fraction form
    2,104.20/3,156.19 = 643.25/x
  3. Step 3: Cross multiply
    2,104.20x = 3,156.19 × 643.25
  4. Step 4: Simplify right side
    2,104.20x = 2,030,204.24
  5. Step 5: Solve for x
    x = 2,030,204.24/2,104.20
  6. Step 6: Final answer
    x = 964.83

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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.