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Finding the Fourth Proportional to 1,097.88, 1,647.02 and 520.75

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Solution

The fourth proportional to 1,097.88, 1,647.02 and 520.75 is: 781.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,097.88 : 1,647.02 = 520.75 : x
  2. Step 2: Convert to fraction form
    1,097.88/1,647.02 = 520.75/x
  3. Step 3: Cross multiply
    1,097.88x = 1,647.02 × 520.75
  4. Step 4: Simplify right side
    1,097.88x = 857,685.67
  5. Step 5: Solve for x
    x = 857,685.67/1,097.88
  6. Step 6: Final answer
    x = 781.22

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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.