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Finding the Fourth Proportional to 657.25, 906.99 and 377.65

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Solution

The fourth proportional to 657.25, 906.99 and 377.65 is: 521.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.25 : 906.99 = 377.65 : x
  2. Step 2: Convert to fraction form
    657.25/906.99 = 377.65/x
  3. Step 3: Cross multiply
    657.25x = 906.99 × 377.65
  4. Step 4: Simplify right side
    657.25x = 342,524.77
  5. Step 5: Solve for x
    x = 342,524.77/657.25
  6. Step 6: Final answer
    x = 521.15

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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.