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Finding the Fourth Proportional to 1,614.98, 2,422.40 and 519.40

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Solution

The fourth proportional to 1,614.98, 2,422.40 and 519.40 is: 779.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,614.98 : 2,422.40 = 519.40 : x
  2. Step 2: Convert to fraction form
    1,614.98/2,422.40 = 519.40/x
  3. Step 3: Cross multiply
    1,614.98x = 2,422.40 × 519.40
  4. Step 4: Simplify right side
    1,614.98x = 1,258,194.56
  5. Step 5: Solve for x
    x = 1,258,194.56/1,614.98
  6. Step 6: Final answer
    x = 779.08

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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.