Home / 2,285.11-3,153.43-1,290.37

Finding the Fourth Proportional to 2,285.11, 3,153.43 and 1,290.37

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Solution

The fourth proportional to 2,285.11, 3,153.43 and 1,290.37 is: 1,780.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,285.11 : 3,153.43 = 1,290.37 : x
  2. Step 2: Convert to fraction form
    2,285.11/3,153.43 = 1,290.37/x
  3. Step 3: Cross multiply
    2,285.11x = 3,153.43 × 1,290.37
  4. Step 4: Simplify right side
    2,285.11x = 4,069,091.47
  5. Step 5: Solve for x
    x = 4,069,091.47/2,285.11
  6. Step 6: Final answer
    x = 1,780.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.