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Finding the Fourth Proportional to 5,212, 7,815.36 and 1,748

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Solution

The fourth proportional to 5,212, 7,815.36 and 1,748 is: 2,621.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,212 : 7,815.36 = 1,748 : x
  2. Step 2: Convert to fraction form
    5,212/7,815.36 = 1,748/x
  3. Step 3: Cross multiply
    5,212x = 7,815.36 × 1,748
  4. Step 4: Simplify right side
    5,212x = 13,661,249.28
  5. Step 5: Solve for x
    x = 13,661,249.28/5,212
  6. Step 6: Final answer
    x = 2,621.11

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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.