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Finding the Fourth Proportional to 1,351, 2,026.56 and 426.88

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Solution

The fourth proportional to 1,351, 2,026.56 and 426.88 is: 640.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351 : 2,026.56 = 426.88 : x
  2. Step 2: Convert to fraction form
    1,351/2,026.56 = 426.88/x
  3. Step 3: Cross multiply
    1,351x = 2,026.56 × 426.88
  4. Step 4: Simplify right side
    1,351x = 865,097.93
  5. Step 5: Solve for x
    x = 865,097.93/1,351
  6. Step 6: Final answer
    x = 640.34

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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.