Home / 3,006.78-4,149.35-1,680.47

Finding the Fourth Proportional to 3,006.78, 4,149.35 and 1,680.47

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Solution

The fourth proportional to 3,006.78, 4,149.35 and 1,680.47 is: 2,319.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,006.78 : 4,149.35 = 1,680.47 : x
  2. Step 2: Convert to fraction form
    3,006.78/4,149.35 = 1,680.47/x
  3. Step 3: Cross multiply
    3,006.78x = 4,149.35 × 1,680.47
  4. Step 4: Simplify right side
    3,006.78x = 6,972,860.17
  5. Step 5: Solve for x
    x = 6,972,860.17/3,006.78
  6. Step 6: Final answer
    x = 2,319.05

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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.