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Finding the Fourth Proportional to 3,858.42, 5,787.64 and 936.71

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Solution

The fourth proportional to 3,858.42, 5,787.64 and 936.71 is: 1,405.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,858.42 : 5,787.64 = 936.71 : x
  2. Step 2: Convert to fraction form
    3,858.42/5,787.64 = 936.71/x
  3. Step 3: Cross multiply
    3,858.42x = 5,787.64 × 936.71
  4. Step 4: Simplify right side
    3,858.42x = 5,421,328.93
  5. Step 5: Solve for x
    x = 5,421,328.93/3,858.42
  6. Step 6: Final answer
    x = 1,405.06

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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.