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Finding the Fourth Proportional to 5,147.77, 7,721.70 and 1,252.21

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Solution

The fourth proportional to 5,147.77, 7,721.70 and 1,252.21 is: 1,878.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,147.77 : 7,721.70 = 1,252.21 : x
  2. Step 2: Convert to fraction form
    5,147.77/7,721.70 = 1,252.21/x
  3. Step 3: Cross multiply
    5,147.77x = 7,721.70 × 1,252.21
  4. Step 4: Simplify right side
    5,147.77x = 9,669,189.96
  5. Step 5: Solve for x
    x = 9,669,189.96/5,147.77
  6. Step 6: Final answer
    x = 1,878.33

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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.