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Finding the Fourth Proportional to 1,761.07, 2,641.64 and 665.95

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Solution

The fourth proportional to 1,761.07, 2,641.64 and 665.95 is: 998.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,761.07 : 2,641.64 = 665.95 : x
  2. Step 2: Convert to fraction form
    1,761.07/2,641.64 = 665.95/x
  3. Step 3: Cross multiply
    1,761.07x = 2,641.64 × 665.95
  4. Step 4: Simplify right side
    1,761.07x = 1,759,196.83
  5. Step 5: Solve for x
    x = 1,759,196.83/1,761.07
  6. Step 6: Final answer
    x = 998.94

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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.