Home / 2,102.90-2,901.96-1,171.40

Finding the Fourth Proportional to 2,102.90, 2,901.96 and 1,171.40

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Solution

The fourth proportional to 2,102.90, 2,901.96 and 1,171.40 is: 1,616.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,102.90 : 2,901.96 = 1,171.40 : x
  2. Step 2: Convert to fraction form
    2,102.90/2,901.96 = 1,171.40/x
  3. Step 3: Cross multiply
    2,102.90x = 2,901.96 × 1,171.40
  4. Step 4: Simplify right side
    2,102.90x = 3,399,355.94
  5. Step 5: Solve for x
    x = 3,399,355.94/2,102.90
  6. Step 6: Final answer
    x = 1,616.51

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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.