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Finding the Fourth Proportional to 5,147.93, 7,721.90 and 1,252.33

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Solution

The fourth proportional to 5,147.93, 7,721.90 and 1,252.33 is: 1,878.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,147.93 : 7,721.90 = 1,252.33 : x
  2. Step 2: Convert to fraction form
    5,147.93/7,721.90 = 1,252.33/x
  3. Step 3: Cross multiply
    5,147.93x = 7,721.90 × 1,252.33
  4. Step 4: Simplify right side
    5,147.93x = 9,670,346.16
  5. Step 5: Solve for x
    x = 9,670,346.16/5,147.93
  6. Step 6: Final answer
    x = 1,878.49

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Double scale
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Similar ratio
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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.