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Finding the Fourth Proportional to 1,171.19, 1,755.15 and 910.00

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Solution

The fourth proportional to 1,171.19, 1,755.15 and 910.00 is: 1,363.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171.19 : 1,755.15 = 910.00 : x
  2. Step 2: Convert to fraction form
    1,171.19/1,755.15 = 910.00/x
  3. Step 3: Cross multiply
    1,171.19x = 1,755.15 × 910.00
  4. Step 4: Simplify right side
    1,171.19x = 1,597,185.28
  5. Step 5: Solve for x
    x = 1,597,185.28/1,171.19
  6. Step 6: Final answer
    x = 1,363.73

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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.