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Finding the Fourth Proportional to 1,324.34, 1,986.36 and 337.15

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Solution

The fourth proportional to 1,324.34, 1,986.36 and 337.15 is: 505.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,324.34 : 1,986.36 = 337.15 : x
  2. Step 2: Convert to fraction form
    1,324.34/1,986.36 = 337.15/x
  3. Step 3: Cross multiply
    1,324.34x = 1,986.36 × 337.15
  4. Step 4: Simplify right side
    1,324.34x = 669,701.27
  5. Step 5: Solve for x
    x = 669,701.27/1,324.34
  6. Step 6: Final answer
    x = 505.69

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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.