Home / 2,643.80-3,649.94-1,805.72

Finding the Fourth Proportional to 2,643.80, 3,649.94 and 1,805.72

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Solution

The fourth proportional to 2,643.80, 3,649.94 and 1,805.72 is: 2,492.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,643.80 : 3,649.94 = 1,805.72 : x
  2. Step 2: Convert to fraction form
    2,643.80/3,649.94 = 1,805.72/x
  3. Step 3: Cross multiply
    2,643.80x = 3,649.94 × 1,805.72
  4. Step 4: Simplify right side
    2,643.80x = 6,590,769.66
  5. Step 5: Solve for x
    x = 6,590,769.66/2,643.80
  6. Step 6: Final answer
    x = 2,492.92

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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.