Home / 2,658.39-3,988.22-1,685.31

Finding the Fourth Proportional to 2,658.39, 3,988.22 and 1,685.31

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Solution

The fourth proportional to 2,658.39, 3,988.22 and 1,685.31 is: 2,528.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,658.39 : 3,988.22 = 1,685.31 : x
  2. Step 2: Convert to fraction form
    2,658.39/3,988.22 = 1,685.31/x
  3. Step 3: Cross multiply
    2,658.39x = 3,988.22 × 1,685.31
  4. Step 4: Simplify right side
    2,658.39x = 6,721,387.05
  5. Step 5: Solve for x
    x = 6,721,387.05/2,658.39
  6. Step 6: Final answer
    x = 2,528.37

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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.