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Finding the Fourth Proportional to 657.45, 907.02 and 408.60

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Solution

The fourth proportional to 657.45, 907.02 and 408.60 is: 563.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.45 : 907.02 = 408.60 : x
  2. Step 2: Convert to fraction form
    657.45/907.02 = 408.60/x
  3. Step 3: Cross multiply
    657.45x = 907.02 × 408.60
  4. Step 4: Simplify right side
    657.45x = 370,608.37
  5. Step 5: Solve for x
    x = 370,608.37/657.45
  6. Step 6: Final answer
    x = 563.71

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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.