Home / 1,323.72-1,985.58-911.62

Finding the Fourth Proportional to 1,323.72, 1,985.58 and 911.62

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Solution

The fourth proportional to 1,323.72, 1,985.58 and 911.62 is: 1,367.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,323.72 : 1,985.58 = 911.62 : x
  2. Step 2: Convert to fraction form
    1,323.72/1,985.58 = 911.62/x
  3. Step 3: Cross multiply
    1,323.72x = 1,985.58 × 911.62
  4. Step 4: Simplify right side
    1,323.72x = 1,810,096.92
  5. Step 5: Solve for x
    x = 1,810,096.92/1,323.72
  6. Step 6: Final answer
    x = 1,367.43

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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.