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Finding the Fourth Proportional to 2,585.68, 3,878.08 and 854.32

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Solution

The fourth proportional to 2,585.68, 3,878.08 and 854.32 is: 1,281.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,585.68 : 3,878.08 = 854.32 : x
  2. Step 2: Convert to fraction form
    2,585.68/3,878.08 = 854.32/x
  3. Step 3: Cross multiply
    2,585.68x = 3,878.08 × 854.32
  4. Step 4: Simplify right side
    2,585.68x = 3,313,121.31
  5. Step 5: Solve for x
    x = 3,313,121.31/2,585.68
  6. Step 6: Final answer
    x = 1,281.33

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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.