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Finding the Fourth Proportional to 656.92, 906.56 and 408.12

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Solution

The fourth proportional to 656.92, 906.56 and 408.12 is: 563.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.92 : 906.56 = 408.12 : x
  2. Step 2: Convert to fraction form
    656.92/906.56 = 408.12/x
  3. Step 3: Cross multiply
    656.92x = 906.56 × 408.12
  4. Step 4: Simplify right side
    656.92x = 369,985.27
  5. Step 5: Solve for x
    x = 369,985.27/656.92
  6. Step 6: Final answer
    x = 563.21

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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.