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Finding the Fourth Proportional to 1,494.92, 2,063.40 and 905.78

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Solution

The fourth proportional to 1,494.92, 2,063.40 and 905.78 is: 1,250.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,494.92 : 2,063.40 = 905.78 : x
  2. Step 2: Convert to fraction form
    1,494.92/2,063.40 = 905.78/x
  3. Step 3: Cross multiply
    1,494.92x = 2,063.40 × 905.78
  4. Step 4: Simplify right side
    1,494.92x = 1,868,986.45
  5. Step 5: Solve for x
    x = 1,868,986.45/1,494.92
  6. Step 6: Final answer
    x = 1,250.23

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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.