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Finding the Fourth Proportional to 5,248.40, 7,872.56 and 1,352.78

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Solution

The fourth proportional to 5,248.40, 7,872.56 and 1,352.78 is: 2,029.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,248.40 : 7,872.56 = 1,352.78 : x
  2. Step 2: Convert to fraction form
    5,248.40/7,872.56 = 1,352.78/x
  3. Step 3: Cross multiply
    5,248.40x = 7,872.56 × 1,352.78
  4. Step 4: Simplify right side
    5,248.40x = 10,649,841.72
  5. Step 5: Solve for x
    x = 10,649,841.72/5,248.40
  6. Step 6: Final answer
    x = 2,029.16

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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.