Home / 3,120.28-4,678.07-1,887.43

Finding the Fourth Proportional to 3,120.28, 4,678.07 and 1,887.43

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Solution

The fourth proportional to 3,120.28, 4,678.07 and 1,887.43 is: 2,829.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.28 : 4,678.07 = 1,887.43 : x
  2. Step 2: Convert to fraction form
    3,120.28/4,678.07 = 1,887.43/x
  3. Step 3: Cross multiply
    3,120.28x = 4,678.07 × 1,887.43
  4. Step 4: Simplify right side
    3,120.28x = 8,829,529.66
  5. Step 5: Solve for x
    x = 8,829,529.66/3,120.28
  6. Step 6: Final answer
    x = 2,829.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.