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Finding the Fourth Proportional to 5,252.96, 7,878.48 and 1,965.20

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Solution

The fourth proportional to 5,252.96, 7,878.48 and 1,965.20 is: 2,947.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,252.96 : 7,878.48 = 1,965.20 : x
  2. Step 2: Convert to fraction form
    5,252.96/7,878.48 = 1,965.20/x
  3. Step 3: Cross multiply
    5,252.96x = 7,878.48 × 1,965.20
  4. Step 4: Simplify right side
    5,252.96x = 15,482,788.90
  5. Step 5: Solve for x
    x = 15,482,788.90/5,252.96
  6. Step 6: Final answer
    x = 2,947.44

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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.