Home / 1,549.36-2,138.01-919.85

Finding the Fourth Proportional to 1,549.36, 2,138.01 and 919.85

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Solution

The fourth proportional to 1,549.36, 2,138.01 and 919.85 is: 1,269.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,549.36 : 2,138.01 = 919.85 : x
  2. Step 2: Convert to fraction form
    1,549.36/2,138.01 = 919.85/x
  3. Step 3: Cross multiply
    1,549.36x = 2,138.01 × 919.85
  4. Step 4: Simplify right side
    1,549.36x = 1,966,648.97
  5. Step 5: Solve for x
    x = 1,966,648.97/1,549.36
  6. Step 6: Final answer
    x = 1,269.33

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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.