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Finding the Fourth Proportional to 656.28, 905.42 and 376.32

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Solution

The fourth proportional to 656.28, 905.42 and 376.32 is: 519.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.28 : 905.42 = 376.32 : x
  2. Step 2: Convert to fraction form
    656.28/905.42 = 376.32/x
  3. Step 3: Cross multiply
    656.28x = 905.42 × 376.32
  4. Step 4: Simplify right side
    656.28x = 340,725.77
  5. Step 5: Solve for x
    x = 340,725.77/656.28
  6. Step 6: Final answer
    x = 519.18

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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.