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Finding the Fourth Proportional to 4,390.56, 6,581.39 and 1,578.56

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Solution

The fourth proportional to 4,390.56, 6,581.39 and 1,578.56 is: 2,366.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,390.56 : 6,581.39 = 1,578.56 : x
  2. Step 2: Convert to fraction form
    4,390.56/6,581.39 = 1,578.56/x
  3. Step 3: Cross multiply
    4,390.56x = 6,581.39 × 1,578.56
  4. Step 4: Simplify right side
    4,390.56x = 10,389,084.12
  5. Step 5: Solve for x
    x = 10,389,084.12/4,390.56
  6. Step 6: Final answer
    x = 2,366.23

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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.