Home / 2,156.13-3,234.80-695.40

Finding the Fourth Proportional to 2,156.13, 3,234.80 and 695.40

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Solution

The fourth proportional to 2,156.13, 3,234.80 and 695.40 is: 1,043.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.13 : 3,234.80 = 695.40 : x
  2. Step 2: Convert to fraction form
    2,156.13/3,234.80 = 695.40/x
  3. Step 3: Cross multiply
    2,156.13x = 3,234.80 × 695.40
  4. Step 4: Simplify right side
    2,156.13x = 2,249,469.53
  5. Step 5: Solve for x
    x = 2,249,469.53/2,156.13
  6. Step 6: Final answer
    x = 1,043.29

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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.