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Finding the Fourth Proportional to 1,272.94, 1,755.94 and 874.62

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Solution

The fourth proportional to 1,272.94, 1,755.94 and 874.62 is: 1,206.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272.94 : 1,755.94 = 874.62 : x
  2. Step 2: Convert to fraction form
    1,272.94/1,755.94 = 874.62/x
  3. Step 3: Cross multiply
    1,272.94x = 1,755.94 × 874.62
  4. Step 4: Simplify right side
    1,272.94x = 1,535,780.24
  5. Step 5: Solve for x
    x = 1,535,780.24/1,272.94
  6. Step 6: Final answer
    x = 1,206.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.