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Finding the Fourth Proportional to 2,156.50, 3,235.43 and 695.77

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Solution

The fourth proportional to 2,156.50, 3,235.43 and 695.77 is: 1,043.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.50 : 3,235.43 = 695.77 : x
  2. Step 2: Convert to fraction form
    2,156.50/3,235.43 = 695.77/x
  3. Step 3: Cross multiply
    2,156.50x = 3,235.43 × 695.77
  4. Step 4: Simplify right side
    2,156.50x = 2,251,108.78
  5. Step 5: Solve for x
    x = 2,251,108.78/2,156.50
  6. Step 6: Final answer
    x = 1,043.87

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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.