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Finding the Fourth Proportional to 1,651.38, 2,278.26 and 988.26

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Solution

The fourth proportional to 1,651.38, 2,278.26 and 988.26 is: 1,363.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,651.38 : 2,278.26 = 988.26 : x
  2. Step 2: Convert to fraction form
    1,651.38/2,278.26 = 988.26/x
  3. Step 3: Cross multiply
    1,651.38x = 2,278.26 × 988.26
  4. Step 4: Simplify right side
    1,651.38x = 2,251,513.23
  5. Step 5: Solve for x
    x = 2,251,513.23/1,651.38
  6. Step 6: Final answer
    x = 1,363.41

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1.5x scale

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.