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Finding the Fourth Proportional to 3,169.15, 4,754.40 and 978.10

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Solution

The fourth proportional to 3,169.15, 4,754.40 and 978.10 is: 1,467.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,169.15 : 4,754.40 = 978.10 : x
  2. Step 2: Convert to fraction form
    3,169.15/4,754.40 = 978.10/x
  3. Step 3: Cross multiply
    3,169.15x = 4,754.40 × 978.10
  4. Step 4: Simplify right side
    3,169.15x = 4,650,278.64
  5. Step 5: Solve for x
    x = 4,650,278.64/3,169.15
  6. Step 6: Final answer
    x = 1,467.36

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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.