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Finding the Fourth Proportional to 1,174.98, 1,761.66 and 785.10

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Solution

The fourth proportional to 1,174.98, 1,761.66 and 785.10 is: 1,177.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.98 : 1,761.66 = 785.10 : x
  2. Step 2: Convert to fraction form
    1,174.98/1,761.66 = 785.10/x
  3. Step 3: Cross multiply
    1,174.98x = 1,761.66 × 785.10
  4. Step 4: Simplify right side
    1,174.98x = 1,383,079.27
  5. Step 5: Solve for x
    x = 1,383,079.27/1,174.98
  6. Step 6: Final answer
    x = 1,177.11

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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.