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Finding the Fourth Proportional to 2,568.86, 3,852.62 and 719.90

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Solution

The fourth proportional to 2,568.86, 3,852.62 and 719.90 is: 1,079.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,568.86 : 3,852.62 = 719.90 : x
  2. Step 2: Convert to fraction form
    2,568.86/3,852.62 = 719.90/x
  3. Step 3: Cross multiply
    2,568.86x = 3,852.62 × 719.90
  4. Step 4: Simplify right side
    2,568.86x = 2,773,501.14
  5. Step 5: Solve for x
    x = 2,773,501.14/2,568.86
  6. Step 6: Final answer
    x = 1,079.66

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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.