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Finding the Fourth Proportional to 2,693.15, 4,039.72 and 745.30

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Solution

The fourth proportional to 2,693.15, 4,039.72 and 745.30 is: 1,117.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,693.15 : 4,039.72 = 745.30 : x
  2. Step 2: Convert to fraction form
    2,693.15/4,039.72 = 745.30/x
  3. Step 3: Cross multiply
    2,693.15x = 4,039.72 × 745.30
  4. Step 4: Simplify right side
    2,693.15x = 3,010,779.39
  5. Step 5: Solve for x
    x = 3,010,779.39/2,693.15
  6. Step 6: Final answer
    x = 1,117.94

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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.