Home / 2,887.45-3,984.69-1,561.17

Finding the Fourth Proportional to 2,887.45, 3,984.69 and 1,561.17

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Solution

The fourth proportional to 2,887.45, 3,984.69 and 1,561.17 is: 2,154.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,887.45 : 3,984.69 = 1,561.17 : x
  2. Step 2: Convert to fraction form
    2,887.45/3,984.69 = 1,561.17/x
  3. Step 3: Cross multiply
    2,887.45x = 3,984.69 × 1,561.17
  4. Step 4: Simplify right side
    2,887.45x = 6,220,778.49
  5. Step 5: Solve for x
    x = 6,220,778.49/2,887.45
  6. Step 6: Final answer
    x = 2,154.42

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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.