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Finding the Fourth Proportional to 1,578.21, 2,367.15 and 482.61

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Solution

The fourth proportional to 1,578.21, 2,367.15 and 482.61 is: 723.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,578.21 : 2,367.15 = 482.61 : x
  2. Step 2: Convert to fraction form
    1,578.21/2,367.15 = 482.61/x
  3. Step 3: Cross multiply
    1,578.21x = 2,367.15 × 482.61
  4. Step 4: Simplify right side
    1,578.21x = 1,142,410.26
  5. Step 5: Solve for x
    x = 1,142,410.26/1,578.21
  6. Step 6: Final answer
    x = 723.86

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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.