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Finding the Fourth Proportional to 1,535.94, 2,119.88 and 906.44

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Solution

The fourth proportional to 1,535.94, 2,119.88 and 906.44 is: 1,251.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,535.94 : 2,119.88 = 906.44 : x
  2. Step 2: Convert to fraction form
    1,535.94/2,119.88 = 906.44/x
  3. Step 3: Cross multiply
    1,535.94x = 2,119.88 × 906.44
  4. Step 4: Simplify right side
    1,535.94x = 1,921,528.90
  5. Step 5: Solve for x
    x = 1,921,528.90/1,535.94
  6. Step 6: Final answer
    x = 1,251.04

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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.