Home / 2,103.20-3,154.81-869.26

Finding the Fourth Proportional to 2,103.20, 3,154.81 and 869.26

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Solution

The fourth proportional to 2,103.20, 3,154.81 and 869.26 is: 1,303.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,103.20 : 3,154.81 = 869.26 : x
  2. Step 2: Convert to fraction form
    2,103.20/3,154.81 = 869.26/x
  3. Step 3: Cross multiply
    2,103.20x = 3,154.81 × 869.26
  4. Step 4: Simplify right side
    2,103.20x = 2,742,350.14
  5. Step 5: Solve for x
    x = 2,742,350.14/2,103.20
  6. Step 6: Final answer
    x = 1,303.89

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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.