Home / 2,285.39-3,153.79-1,290.63

Finding the Fourth Proportional to 2,285.39, 3,153.79 and 1,290.63

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Solution

The fourth proportional to 2,285.39, 3,153.79 and 1,290.63 is: 1,781.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,285.39 : 3,153.79 = 1,290.63 : x
  2. Step 2: Convert to fraction form
    2,285.39/3,153.79 = 1,290.63/x
  3. Step 3: Cross multiply
    2,285.39x = 3,153.79 × 1,290.63
  4. Step 4: Simplify right side
    2,285.39x = 4,070,382.17
  5. Step 5: Solve for x
    x = 4,070,382.17/2,285.39
  6. Step 6: Final answer
    x = 1,781.05

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1.5x scale

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.