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Finding the Fourth Proportional to 2,156.49, 3,234.81 and 695.46

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Solution

The fourth proportional to 2,156.49, 3,234.81 and 695.46 is: 1,043.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.49 : 3,234.81 = 695.46 : x
  2. Step 2: Convert to fraction form
    2,156.49/3,234.81 = 695.46/x
  3. Step 3: Cross multiply
    2,156.49x = 3,234.81 × 695.46
  4. Step 4: Simplify right side
    2,156.49x = 2,249,680.96
  5. Step 5: Solve for x
    x = 2,249,680.96/2,156.49
  6. Step 6: Final answer
    x = 1,043.21

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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.