Home / 2,984.47-4,119.72-1,989.39

Finding the Fourth Proportional to 2,984.47, 4,119.72 and 1,989.39

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Solution

The fourth proportional to 2,984.47, 4,119.72 and 1,989.39 is: 2,746.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,984.47 : 4,119.72 = 1,989.39 : x
  2. Step 2: Convert to fraction form
    2,984.47/4,119.72 = 1,989.39/x
  3. Step 3: Cross multiply
    2,984.47x = 4,119.72 × 1,989.39
  4. Step 4: Simplify right side
    2,984.47x = 8,195,729.77
  5. Step 5: Solve for x
    x = 8,195,729.77/2,984.47
  6. Step 6: Final answer
    x = 2,746.13

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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.