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Finding the Fourth Proportional to 2,159.46, 3,239.64 and 698.61

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Solution

The fourth proportional to 2,159.46, 3,239.64 and 698.61 is: 1,048.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.46 : 3,239.64 = 698.61 : x
  2. Step 2: Convert to fraction form
    2,159.46/3,239.64 = 698.61/x
  3. Step 3: Cross multiply
    2,159.46x = 3,239.64 × 698.61
  4. Step 4: Simplify right side
    2,159.46x = 2,263,244.90
  5. Step 5: Solve for x
    x = 2,263,244.90/2,159.46
  6. Step 6: Final answer
    x = 1,048.06

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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.