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Finding the Fourth Proportional to 1,195.61, 1,790.07 and 645.82

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Solution

The fourth proportional to 1,195.61, 1,790.07 and 645.82 is: 966.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,195.61 : 1,790.07 = 645.82 : x
  2. Step 2: Convert to fraction form
    1,195.61/1,790.07 = 645.82/x
  3. Step 3: Cross multiply
    1,195.61x = 1,790.07 × 645.82
  4. Step 4: Simplify right side
    1,195.61x = 1,156,063.01
  5. Step 5: Solve for x
    x = 1,156,063.01/1,195.61
  6. Step 6: Final answer
    x = 966.93

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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.