Home / 4,290.78-6,439.05-1,982.46

Finding the Fourth Proportional to 4,290.78, 6,439.05 and 1,982.46

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Solution

The fourth proportional to 4,290.78, 6,439.05 and 1,982.46 is: 2,975.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,290.78 : 6,439.05 = 1,982.46 : x
  2. Step 2: Convert to fraction form
    4,290.78/6,439.05 = 1,982.46/x
  3. Step 3: Cross multiply
    4,290.78x = 6,439.05 × 1,982.46
  4. Step 4: Simplify right side
    4,290.78x = 12,765,159.06
  5. Step 5: Solve for x
    x = 12,765,159.06/4,290.78
  6. Step 6: Final answer
    x = 2,975.02

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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.