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Finding the Fourth Proportional to 1,779.97, 2,670.92 and 740.69

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Solution

The fourth proportional to 1,779.97, 2,670.92 and 740.69 is: 1,111.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.97 : 2,670.92 = 740.69 : x
  2. Step 2: Convert to fraction form
    1,779.97/2,670.92 = 740.69/x
  3. Step 3: Cross multiply
    1,779.97x = 2,670.92 × 740.69
  4. Step 4: Simplify right side
    1,779.97x = 1,978,306.68
  5. Step 5: Solve for x
    x = 1,978,306.68/1,779.97
  6. Step 6: Final answer
    x = 1,111.43

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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.