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Finding the Fourth Proportional to 3,900.24, 5,850.36 and 978.53

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Solution

The fourth proportional to 3,900.24, 5,850.36 and 978.53 is: 1,467.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.24 : 5,850.36 = 978.53 : x
  2. Step 2: Convert to fraction form
    3,900.24/5,850.36 = 978.53/x
  3. Step 3: Cross multiply
    3,900.24x = 5,850.36 × 978.53
  4. Step 4: Simplify right side
    3,900.24x = 5,724,723.52
  5. Step 5: Solve for x
    x = 5,724,723.52/3,900.24
  6. Step 6: Final answer
    x = 1,467.79

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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.