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Finding the Fourth Proportional to 907.26, 1,250.91 and 644.82

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Solution

The fourth proportional to 907.26, 1,250.91 and 644.82 is: 889.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.26 : 1,250.91 = 644.82 : x
  2. Step 2: Convert to fraction form
    907.26/1,250.91 = 644.82/x
  3. Step 3: Cross multiply
    907.26x = 1,250.91 × 644.82
  4. Step 4: Simplify right side
    907.26x = 806,611.79
  5. Step 5: Solve for x
    x = 806,611.79/907.26
  6. Step 6: Final answer
    x = 889.06

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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.