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Finding the Fourth Proportional to 2,671.55, 4,007.30 and 723.74

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Solution

The fourth proportional to 2,671.55, 4,007.30 and 723.74 is: 1,085.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,671.55 : 4,007.30 = 723.74 : x
  2. Step 2: Convert to fraction form
    2,671.55/4,007.30 = 723.74/x
  3. Step 3: Cross multiply
    2,671.55x = 4,007.30 × 723.74
  4. Step 4: Simplify right side
    2,671.55x = 2,900,243.30
  5. Step 5: Solve for x
    x = 2,900,243.30/2,671.55
  6. Step 6: Final answer
    x = 1,085.61

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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.