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Finding the Fourth Proportional to 2,384.75, 3,578.75 and 845.75

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Solution

The fourth proportional to 2,384.75, 3,578.75 and 845.75 is: 1,269.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,384.75 : 3,578.75 = 845.75 : x
  2. Step 2: Convert to fraction form
    2,384.75/3,578.75 = 845.75/x
  3. Step 3: Cross multiply
    2,384.75x = 3,578.75 × 845.75
  4. Step 4: Simplify right side
    2,384.75x = 3,026,727.81
  5. Step 5: Solve for x
    x = 3,026,727.81/2,384.75
  6. Step 6: Final answer
    x = 1,269.20

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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.