Home / 2,928.39-4,042.67-1,989.15

Finding the Fourth Proportional to 2,928.39, 4,042.67 and 1,989.15

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Solution

The fourth proportional to 2,928.39, 4,042.67 and 1,989.15 is: 2,746.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,928.39 : 4,042.67 = 1,989.15 : x
  2. Step 2: Convert to fraction form
    2,928.39/4,042.67 = 1,989.15/x
  3. Step 3: Cross multiply
    2,928.39x = 4,042.67 × 1,989.15
  4. Step 4: Simplify right side
    2,928.39x = 8,041,467.08
  5. Step 5: Solve for x
    x = 8,041,467.08/2,928.39
  6. Step 6: Final answer
    x = 2,746.04

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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.