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Finding the Fourth Proportional to 1,656.78, 2,286.39 and 910.75

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Solution

The fourth proportional to 1,656.78, 2,286.39 and 910.75 is: 1,256.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,656.78 : 2,286.39 = 910.75 : x
  2. Step 2: Convert to fraction form
    1,656.78/2,286.39 = 910.75/x
  3. Step 3: Cross multiply
    1,656.78x = 2,286.39 × 910.75
  4. Step 4: Simplify right side
    1,656.78x = 2,082,329.69
  5. Step 5: Solve for x
    x = 2,082,329.69/1,656.78
  6. Step 6: Final answer
    x = 1,256.85

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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.