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Finding the Fourth Proportional to 1,478.48, 2,217.84 and 382.86

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Solution

The fourth proportional to 1,478.48, 2,217.84 and 382.86 is: 574.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,478.48 : 2,217.84 = 382.86 : x
  2. Step 2: Convert to fraction form
    1,478.48/2,217.84 = 382.86/x
  3. Step 3: Cross multiply
    1,478.48x = 2,217.84 × 382.86
  4. Step 4: Simplify right side
    1,478.48x = 849,127.77
  5. Step 5: Solve for x
    x = 849,127.77/1,478.48
  6. Step 6: Final answer
    x = 574.33

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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.