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Finding the Fourth Proportional to 657.40, 907.14 and 377.72

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Solution

The fourth proportional to 657.40, 907.14 and 377.72 is: 521.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.40 : 907.14 = 377.72 : x
  2. Step 2: Convert to fraction form
    657.40/907.14 = 377.72/x
  3. Step 3: Cross multiply
    657.40x = 907.14 × 377.72
  4. Step 4: Simplify right side
    657.40x = 342,644.92
  5. Step 5: Solve for x
    x = 342,644.92/657.40
  6. Step 6: Final answer
    x = 521.21

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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.