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Finding the Fourth Proportional to 7,390, 10,198.11 and 4,245.94

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Solution

The fourth proportional to 7,390, 10,198.11 and 4,245.94 is: 5,859.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,390 : 10,198.11 = 4,245.94 : x
  2. Step 2: Convert to fraction form
    7,390/10,198.11 = 4,245.94/x
  3. Step 3: Cross multiply
    7,390x = 10,198.11 × 4,245.94
  4. Step 4: Simplify right side
    7,390x = 43,300,563.17
  5. Step 5: Solve for x
    x = 43,300,563.17/7,390
  6. Step 6: Final answer
    x = 5,859.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.