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Finding the Fourth Proportional to 907.37, 1,250.84 and 640.98

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Solution

The fourth proportional to 907.37, 1,250.84 and 640.98 is: 883.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.37 : 1,250.84 = 640.98 : x
  2. Step 2: Convert to fraction form
    907.37/1,250.84 = 640.98/x
  3. Step 3: Cross multiply
    907.37x = 1,250.84 × 640.98
  4. Step 4: Simplify right side
    907.37x = 801,760.22
  5. Step 5: Solve for x
    x = 801,760.22/907.37
  6. Step 6: Final answer
    x = 883.61

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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.