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Finding the Fourth Proportional to 378.63, 566.65 and 263.21

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Solution

The fourth proportional to 378.63, 566.65 and 263.21 is: 393.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.63 : 566.65 = 263.21 : x
  2. Step 2: Convert to fraction form
    378.63/566.65 = 263.21/x
  3. Step 3: Cross multiply
    378.63x = 566.65 × 263.21
  4. Step 4: Simplify right side
    378.63x = 149,145.11
  5. Step 5: Solve for x
    x = 149,145.11/378.63
  6. Step 6: Final answer
    x = 393.91

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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.