Home / 3,078.10-4,617.15-1,989.46

Finding the Fourth Proportional to 3,078.10, 4,617.15 and 1,989.46

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Solution

The fourth proportional to 3,078.10, 4,617.15 and 1,989.46 is: 2,984.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.10 : 4,617.15 = 1,989.46 : x
  2. Step 2: Convert to fraction form
    3,078.10/4,617.15 = 1,989.46/x
  3. Step 3: Cross multiply
    3,078.10x = 4,617.15 × 1,989.46
  4. Step 4: Simplify right side
    3,078.10x = 9,185,635.24
  5. Step 5: Solve for x
    x = 9,185,635.24/3,078.10
  6. Step 6: Final answer
    x = 2,984.19

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Double scale
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Similar ratio
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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.