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Finding the Fourth Proportional to 3,788.84, 5,683.80 and 1,191.50

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Solution

The fourth proportional to 3,788.84, 5,683.80 and 1,191.50 is: 1,787.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,788.84 : 5,683.80 = 1,191.50 : x
  2. Step 2: Convert to fraction form
    3,788.84/5,683.80 = 1,191.50/x
  3. Step 3: Cross multiply
    3,788.84x = 5,683.80 × 1,191.50
  4. Step 4: Simplify right side
    3,788.84x = 6,772,247.70
  5. Step 5: Solve for x
    x = 6,772,247.70/3,788.84
  6. Step 6: Final answer
    x = 1,787.42

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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.