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Finding the Fourth Proportional to 731.99, 1,098.39 and 299.45

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Solution

The fourth proportional to 731.99, 1,098.39 and 299.45 is: 449.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.99 : 1,098.39 = 299.45 : x
  2. Step 2: Convert to fraction form
    731.99/1,098.39 = 299.45/x
  3. Step 3: Cross multiply
    731.99x = 1,098.39 × 299.45
  4. Step 4: Simplify right side
    731.99x = 328,916.75
  5. Step 5: Solve for x
    x = 328,916.75/731.99
  6. Step 6: Final answer
    x = 449.34

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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.