Home / 2,156.60-3,230.04-1,289.10

Finding the Fourth Proportional to 2,156.60, 3,230.04 and 1,289.10

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Solution

The fourth proportional to 2,156.60, 3,230.04 and 1,289.10 is: 1,930.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.60 : 3,230.04 = 1,289.10 : x
  2. Step 2: Convert to fraction form
    2,156.60/3,230.04 = 1,289.10/x
  3. Step 3: Cross multiply
    2,156.60x = 3,230.04 × 1,289.10
  4. Step 4: Simplify right side
    2,156.60x = 4,163,844.56
  5. Step 5: Solve for x
    x = 4,163,844.56/2,156.60
  6. Step 6: Final answer
    x = 1,930.74

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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.