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Finding the Fourth Proportional to 656.20, 905.61 and 376.52

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Solution

The fourth proportional to 656.20, 905.61 and 376.52 is: 519.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.20 : 905.61 = 376.52 : x
  2. Step 2: Convert to fraction form
    656.20/905.61 = 376.52/x
  3. Step 3: Cross multiply
    656.20x = 905.61 × 376.52
  4. Step 4: Simplify right side
    656.20x = 340,977.16
  5. Step 5: Solve for x
    x = 340,977.16/656.20
  6. Step 6: Final answer
    x = 519.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.