Home / 2,104.24-3,156.25-643.29

Finding the Fourth Proportional to 2,104.24, 3,156.25 and 643.29

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Solution

The fourth proportional to 2,104.24, 3,156.25 and 643.29 is: 964.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,104.24 : 3,156.25 = 643.29 : x
  2. Step 2: Convert to fraction form
    2,104.24/3,156.25 = 643.29/x
  3. Step 3: Cross multiply
    2,104.24x = 3,156.25 × 643.29
  4. Step 4: Simplify right side
    2,104.24x = 2,030,384.06
  5. Step 5: Solve for x
    x = 2,030,384.06/2,104.24
  6. Step 6: Final answer
    x = 964.90

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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.