Home / 1,191.24-1,787.31-498.38

Finding the Fourth Proportional to 1,191.24, 1,787.31 and 498.38

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Solution

The fourth proportional to 1,191.24, 1,787.31 and 498.38 is: 747.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191.24 : 1,787.31 = 498.38 : x
  2. Step 2: Convert to fraction form
    1,191.24/1,787.31 = 498.38/x
  3. Step 3: Cross multiply
    1,191.24x = 1,787.31 × 498.38
  4. Step 4: Simplify right side
    1,191.24x = 890,750.62
  5. Step 5: Solve for x
    x = 890,750.62/1,191.24
  6. Step 6: Final answer
    x = 747.75

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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.