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Finding the Fourth Proportional to 4,978.69, 7,472.66 and 2,515.25

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Solution

The fourth proportional to 4,978.69, 7,472.66 and 2,515.25 is: 3,775.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,978.69 : 7,472.66 = 2,515.25 : x
  2. Step 2: Convert to fraction form
    4,978.69/7,472.66 = 2,515.25/x
  3. Step 3: Cross multiply
    4,978.69x = 7,472.66 × 2,515.25
  4. Step 4: Simplify right side
    4,978.69x = 18,795,572.14
  5. Step 5: Solve for x
    x = 18,795,572.14/4,978.69
  6. Step 6: Final answer
    x = 3,775.20

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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.