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Finding the Fourth Proportional to 1,478.13, 2,217.03 and 382.41

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Solution

The fourth proportional to 1,478.13, 2,217.03 and 382.41 is: 573.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,478.13 : 2,217.03 = 382.41 : x
  2. Step 2: Convert to fraction form
    1,478.13/2,217.03 = 382.41/x
  3. Step 3: Cross multiply
    1,478.13x = 2,217.03 × 382.41
  4. Step 4: Simplify right side
    1,478.13x = 847,814.44
  5. Step 5: Solve for x
    x = 847,814.44/1,478.13
  6. Step 6: Final answer
    x = 573.57

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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.