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Finding the Fourth Proportional to 1,033.51, 1,426.48 and 679.91

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Solution

The fourth proportional to 1,033.51, 1,426.48 and 679.91 is: 938.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,033.51 : 1,426.48 = 679.91 : x
  2. Step 2: Convert to fraction form
    1,033.51/1,426.48 = 679.91/x
  3. Step 3: Cross multiply
    1,033.51x = 1,426.48 × 679.91
  4. Step 4: Simplify right side
    1,033.51x = 969,880.39
  5. Step 5: Solve for x
    x = 969,880.39/1,033.51
  6. Step 6: Final answer
    x = 938.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.