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Finding the Fourth Proportional to 5,254.24, 7,878.32 and 2,790.24

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Solution

The fourth proportional to 5,254.24, 7,878.32 and 2,790.24 is: 4,183.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,254.24 : 7,878.32 = 2,790.24 : x
  2. Step 2: Convert to fraction form
    5,254.24/7,878.32 = 2,790.24/x
  3. Step 3: Cross multiply
    5,254.24x = 7,878.32 × 2,790.24
  4. Step 4: Simplify right side
    5,254.24x = 21,982,403.60
  5. Step 5: Solve for x
    x = 21,982,403.60/5,254.24
  6. Step 6: Final answer
    x = 4,183.75

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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.