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Finding the Fourth Proportional to 2,578.16, 3,867.66 and 846.38

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Solution

The fourth proportional to 2,578.16, 3,867.66 and 846.38 is: 1,269.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,578.16 : 3,867.66 = 846.38 : x
  2. Step 2: Convert to fraction form
    2,578.16/3,867.66 = 846.38/x
  3. Step 3: Cross multiply
    2,578.16x = 3,867.66 × 846.38
  4. Step 4: Simplify right side
    2,578.16x = 3,273,490.73
  5. Step 5: Solve for x
    x = 3,273,490.73/2,578.16
  6. Step 6: Final answer
    x = 1,269.70

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1.5x scale

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.