Home / 5,078.28-7,617.58-1,380.50

Finding the Fourth Proportional to 5,078.28, 7,617.58 and 1,380.50

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Solution

The fourth proportional to 5,078.28, 7,617.58 and 1,380.50 is: 2,070.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,078.28 : 7,617.58 = 1,380.50 : x
  2. Step 2: Convert to fraction form
    5,078.28/7,617.58 = 1,380.50/x
  3. Step 3: Cross multiply
    5,078.28x = 7,617.58 × 1,380.50
  4. Step 4: Simplify right side
    5,078.28x = 10,516,027.65
  5. Step 5: Solve for x
    x = 10,516,027.65/5,078.28
  6. Step 6: Final answer
    x = 2,070.79

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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.