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Finding the Fourth Proportional to 656.86, 906.26 and 408.18

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Solution

The fourth proportional to 656.86, 906.26 and 408.18 is: 563.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.86 : 906.26 = 408.18 : x
  2. Step 2: Convert to fraction form
    656.86/906.26 = 408.18/x
  3. Step 3: Cross multiply
    656.86x = 906.26 × 408.18
  4. Step 4: Simplify right side
    656.86x = 369,917.21
  5. Step 5: Solve for x
    x = 369,917.21/656.86
  6. Step 6: Final answer
    x = 563.16

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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.