Home / 2,865.09-3,953.49-1,605.90

Finding the Fourth Proportional to 2,865.09, 3,953.49 and 1,605.90

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Solution

The fourth proportional to 2,865.09, 3,953.49 and 1,605.90 is: 2,215.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,865.09 : 3,953.49 = 1,605.90 : x
  2. Step 2: Convert to fraction form
    2,865.09/3,953.49 = 1,605.90/x
  3. Step 3: Cross multiply
    2,865.09x = 3,953.49 × 1,605.90
  4. Step 4: Simplify right side
    2,865.09x = 6,348,909.59
  5. Step 5: Solve for x
    x = 6,348,909.59/2,865.09
  6. Step 6: Final answer
    x = 2,215.95

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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.