Home / 2,135.10-3,203.55-1,038.90

Finding the Fourth Proportional to 2,135.10, 3,203.55 and 1,038.90

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Solution

The fourth proportional to 2,135.10, 3,203.55 and 1,038.90 is: 1,558.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.10 : 3,203.55 = 1,038.90 : x
  2. Step 2: Convert to fraction form
    2,135.10/3,203.55 = 1,038.90/x
  3. Step 3: Cross multiply
    2,135.10x = 3,203.55 × 1,038.90
  4. Step 4: Simplify right side
    2,135.10x = 3,328,168.10
  5. Step 5: Solve for x
    x = 3,328,168.10/2,135.10
  6. Step 6: Final answer
    x = 1,558.79

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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.