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Finding the Fourth Proportional to 837.07, 1,256.38 and 426.50

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Solution

The fourth proportional to 837.07, 1,256.38 and 426.50 is: 640.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.07 : 1,256.38 = 426.50 : x
  2. Step 2: Convert to fraction form
    837.07/1,256.38 = 426.50/x
  3. Step 3: Cross multiply
    837.07x = 1,256.38 × 426.50
  4. Step 4: Simplify right side
    837.07x = 535,843.94
  5. Step 5: Solve for x
    x = 535,843.94/837.07
  6. Step 6: Final answer
    x = 640.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.