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Finding the Fourth Proportional to 1,169.17, 1,754.30 and 520.09

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Solution

The fourth proportional to 1,169.17, 1,754.30 and 520.09 is: 780.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,169.17 : 1,754.30 = 520.09 : x
  2. Step 2: Convert to fraction form
    1,169.17/1,754.30 = 520.09/x
  3. Step 3: Cross multiply
    1,169.17x = 1,754.30 × 520.09
  4. Step 4: Simplify right side
    1,169.17x = 912,391.29
  5. Step 5: Solve for x
    x = 912,391.29/1,169.17
  6. Step 6: Final answer
    x = 780.38

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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.