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Finding the Fourth Proportional to 657.69, 907.64 and 377.90

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Solution

The fourth proportional to 657.69, 907.64 and 377.90 is: 521.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.69 : 907.64 = 377.90 : x
  2. Step 2: Convert to fraction form
    657.69/907.64 = 377.90/x
  3. Step 3: Cross multiply
    657.69x = 907.64 × 377.90
  4. Step 4: Simplify right side
    657.69x = 342,997.16
  5. Step 5: Solve for x
    x = 342,997.16/657.69
  6. Step 6: Final answer
    x = 521.52

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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.