Home / 3,020.40-4,170.17-1,887.78

Finding the Fourth Proportional to 3,020.40, 4,170.17 and 1,887.78

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Solution

The fourth proportional to 3,020.40, 4,170.17 and 1,887.78 is: 2,606.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,020.40 : 4,170.17 = 1,887.78 : x
  2. Step 2: Convert to fraction form
    3,020.40/4,170.17 = 1,887.78/x
  3. Step 3: Cross multiply
    3,020.40x = 4,170.17 × 1,887.78
  4. Step 4: Simplify right side
    3,020.40x = 7,872,354.08
  5. Step 5: Solve for x
    x = 7,872,354.08/3,020.40
  6. Step 6: Final answer
    x = 2,606.39

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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.