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Finding the Fourth Proportional to 2,159.72, 3,239.09 and 843.51

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Solution

The fourth proportional to 2,159.72, 3,239.09 and 843.51 is: 1,265.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.72 : 3,239.09 = 843.51 : x
  2. Step 2: Convert to fraction form
    2,159.72/3,239.09 = 843.51/x
  3. Step 3: Cross multiply
    2,159.72x = 3,239.09 × 843.51
  4. Step 4: Simplify right side
    2,159.72x = 2,732,204.81
  5. Step 5: Solve for x
    x = 2,732,204.81/2,159.72
  6. Step 6: Final answer
    x = 1,265.07

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1.5x scale

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.