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Finding the Fourth Proportional to 1,427.78, 2,141.81 and 454.03

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Solution

The fourth proportional to 1,427.78, 2,141.81 and 454.03 is: 681.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.78 : 2,141.81 = 454.03 : x
  2. Step 2: Convert to fraction form
    1,427.78/2,141.81 = 454.03/x
  3. Step 3: Cross multiply
    1,427.78x = 2,141.81 × 454.03
  4. Step 4: Simplify right side
    1,427.78x = 972,445.99
  5. Step 5: Solve for x
    x = 972,445.99/1,427.78
  6. Step 6: Final answer
    x = 681.09

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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.