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Finding the Fourth Proportional to 2,572.26, 3,857.79 and 723.55

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Solution

The fourth proportional to 2,572.26, 3,857.79 and 723.55 is: 1,085.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,572.26 : 3,857.79 = 723.55 : x
  2. Step 2: Convert to fraction form
    2,572.26/3,857.79 = 723.55/x
  3. Step 3: Cross multiply
    2,572.26x = 3,857.79 × 723.55
  4. Step 4: Simplify right side
    2,572.26x = 2,791,303.95
  5. Step 5: Solve for x
    x = 2,791,303.95/2,572.26
  6. Step 6: Final answer
    x = 1,085.16

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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.