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Finding the Fourth Proportional to 440.20, 656.90 and 379.36

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Solution

The fourth proportional to 440.20, 656.90 and 379.36 is: 566.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.20 : 656.90 = 379.36 : x
  2. Step 2: Convert to fraction form
    440.20/656.90 = 379.36/x
  3. Step 3: Cross multiply
    440.20x = 656.90 × 379.36
  4. Step 4: Simplify right side
    440.20x = 249,201.58
  5. Step 5: Solve for x
    x = 249,201.58/440.20
  6. Step 6: Final answer
    x = 566.11

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.