Home / 2,102.30-3,152.76-869.78

Finding the Fourth Proportional to 2,102.30, 3,152.76 and 869.78

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Solution

The fourth proportional to 2,102.30, 3,152.76 and 869.78 is: 1,304.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,102.30 : 3,152.76 = 869.78 : x
  2. Step 2: Convert to fraction form
    2,102.30/3,152.76 = 869.78/x
  3. Step 3: Cross multiply
    2,102.30x = 3,152.76 × 869.78
  4. Step 4: Simplify right side
    2,102.30x = 2,742,207.59
  5. Step 5: Solve for x
    x = 2,742,207.59/2,102.30
  6. Step 6: Final answer
    x = 1,304.38

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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.