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Finding the Fourth Proportional to 3,575.81, 5,364.09 and 978.75

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Solution

The fourth proportional to 3,575.81, 5,364.09 and 978.75 is: 1,468.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,575.81 : 5,364.09 = 978.75 : x
  2. Step 2: Convert to fraction form
    3,575.81/5,364.09 = 978.75/x
  3. Step 3: Cross multiply
    3,575.81x = 5,364.09 × 978.75
  4. Step 4: Simplify right side
    3,575.81x = 5,250,103.09
  5. Step 5: Solve for x
    x = 5,250,103.09/3,575.81
  6. Step 6: Final answer
    x = 1,468.23

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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.