Home / 2,887.84-3,985.20-1,628.91

Finding the Fourth Proportional to 2,887.84, 3,985.20 and 1,628.91

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Solution

The fourth proportional to 2,887.84, 3,985.20 and 1,628.91 is: 2,247.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,887.84 : 3,985.20 = 1,628.91 : x
  2. Step 2: Convert to fraction form
    2,887.84/3,985.20 = 1,628.91/x
  3. Step 3: Cross multiply
    2,887.84x = 3,985.20 × 1,628.91
  4. Step 4: Simplify right side
    2,887.84x = 6,491,517.19
  5. Step 5: Solve for x
    x = 6,491,517.19/2,887.84
  6. Step 6: Final answer
    x = 2,247.88

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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.