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Finding the Fourth Proportional to 4,787.86, 7,181.87 and 1,325.11

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Solution

The fourth proportional to 4,787.86, 7,181.87 and 1,325.11 is: 1,987.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,787.86 : 7,181.87 = 1,325.11 : x
  2. Step 2: Convert to fraction form
    4,787.86/7,181.87 = 1,325.11/x
  3. Step 3: Cross multiply
    4,787.86x = 7,181.87 × 1,325.11
  4. Step 4: Simplify right side
    4,787.86x = 9,516,756.64
  5. Step 5: Solve for x
    x = 9,516,756.64/4,787.86
  6. Step 6: Final answer
    x = 1,987.69

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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.