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Finding the Fourth Proportional to 2,156.79, 3,235.38 and 695.97

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Solution

The fourth proportional to 2,156.79, 3,235.38 and 695.97 is: 1,044.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.79 : 3,235.38 = 695.97 : x
  2. Step 2: Convert to fraction form
    2,156.79/3,235.38 = 695.97/x
  3. Step 3: Cross multiply
    2,156.79x = 3,235.38 × 695.97
  4. Step 4: Simplify right side
    2,156.79x = 2,251,727.42
  5. Step 5: Solve for x
    x = 2,251,727.42/2,156.79
  6. Step 6: Final answer
    x = 1,044.02

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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.