Home / 2,101.14-3,149.62-869.40

Finding the Fourth Proportional to 2,101.14, 3,149.62 and 869.40

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Solution

The fourth proportional to 2,101.14, 3,149.62 and 869.40 is: 1,303.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,101.14 : 3,149.62 = 869.40 : x
  2. Step 2: Convert to fraction form
    2,101.14/3,149.62 = 869.40/x
  3. Step 3: Cross multiply
    2,101.14x = 3,149.62 × 869.40
  4. Step 4: Simplify right side
    2,101.14x = 2,738,277.45
  5. Step 5: Solve for x
    x = 2,738,277.45/2,101.14
  6. Step 6: Final answer
    x = 1,303.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.