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Finding the Fourth Proportional to 4,978.81, 7,469.03 and 1,515.25

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Solution

The fourth proportional to 4,978.81, 7,469.03 and 1,515.25 is: 2,273.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,978.81 : 7,469.03 = 1,515.25 : x
  2. Step 2: Convert to fraction form
    4,978.81/7,469.03 = 1,515.25/x
  3. Step 3: Cross multiply
    4,978.81x = 7,469.03 × 1,515.25
  4. Step 4: Simplify right side
    4,978.81x = 11,317,447.71
  5. Step 5: Solve for x
    x = 11,317,447.71/4,978.81
  6. Step 6: Final answer
    x = 2,273.12

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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.