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Finding the Fourth Proportional to 3,858.12, 5,787.18 and 1,085.07

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Solution

The fourth proportional to 3,858.12, 5,787.18 and 1,085.07 is: 1,627.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,858.12 : 5,787.18 = 1,085.07 : x
  2. Step 2: Convert to fraction form
    3,858.12/5,787.18 = 1,085.07/x
  3. Step 3: Cross multiply
    3,858.12x = 5,787.18 × 1,085.07
  4. Step 4: Simplify right side
    3,858.12x = 6,279,491.33
  5. Step 5: Solve for x
    x = 6,279,491.33/3,858.12
  6. Step 6: Final answer
    x = 1,627.60

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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.