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Finding the Fourth Proportional to 657.44, 907.24 and 388.26

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Solution

The fourth proportional to 657.44, 907.24 and 388.26 is: 535.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.44 : 907.24 = 388.26 : x
  2. Step 2: Convert to fraction form
    657.44/907.24 = 388.26/x
  3. Step 3: Cross multiply
    657.44x = 907.24 × 388.26
  4. Step 4: Simplify right side
    657.44x = 352,245.00
  5. Step 5: Solve for x
    x = 352,245.00/657.44
  6. Step 6: Final answer
    x = 535.78

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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.