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Finding the Fourth Proportional to 5,212, 7,818.14 and 1,316.44

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Solution

The fourth proportional to 5,212, 7,818.14 and 1,316.44 is: 1,974.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,212 : 7,818.14 = 1,316.44 : x
  2. Step 2: Convert to fraction form
    5,212/7,818.14 = 1,316.44/x
  3. Step 3: Cross multiply
    5,212x = 7,818.14 × 1,316.44
  4. Step 4: Simplify right side
    5,212x = 10,292,112.22
  5. Step 5: Solve for x
    x = 10,292,112.22/5,212
  6. Step 6: Final answer
    x = 1,974.70

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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.