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Finding the Fourth Proportional to 656.11, 905.43 and 376.35

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Solution

The fourth proportional to 656.11, 905.43 and 376.35 is: 519.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.11 : 905.43 = 376.35 : x
  2. Step 2: Convert to fraction form
    656.11/905.43 = 376.35/x
  3. Step 3: Cross multiply
    656.11x = 905.43 × 376.35
  4. Step 4: Simplify right side
    656.11x = 340,756.32
  5. Step 5: Solve for x
    x = 340,756.32/656.11
  6. Step 6: Final answer
    x = 519.36

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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.