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Finding the Fourth Proportional to 657.04, 906.51 and 394.60

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Solution

The fourth proportional to 657.04, 906.51 and 394.60 is: 544.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.04 : 906.51 = 394.60 : x
  2. Step 2: Convert to fraction form
    657.04/906.51 = 394.60/x
  3. Step 3: Cross multiply
    657.04x = 906.51 × 394.60
  4. Step 4: Simplify right side
    657.04x = 357,708.85
  5. Step 5: Solve for x
    x = 357,708.85/657.04
  6. Step 6: Final answer
    x = 544.42

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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.