Home / 2,507.86-3,761.61-1,121.32

Finding the Fourth Proportional to 2,507.86, 3,761.61 and 1,121.32

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Solution

The fourth proportional to 2,507.86, 3,761.61 and 1,121.32 is: 1,681.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,507.86 : 3,761.61 = 1,121.32 : x
  2. Step 2: Convert to fraction form
    2,507.86/3,761.61 = 1,121.32/x
  3. Step 3: Cross multiply
    2,507.86x = 3,761.61 × 1,121.32
  4. Step 4: Simplify right side
    2,507.86x = 4,217,968.53
  5. Step 5: Solve for x
    x = 4,217,968.53/2,507.86
  6. Step 6: Final answer
    x = 1,681.90

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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.