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Finding the Fourth Proportional to 994.29, 1,491.30 and 344.94

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Solution

The fourth proportional to 994.29, 1,491.30 and 344.94 is: 517.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.29 : 1,491.30 = 344.94 : x
  2. Step 2: Convert to fraction form
    994.29/1,491.30 = 344.94/x
  3. Step 3: Cross multiply
    994.29x = 1,491.30 × 344.94
  4. Step 4: Simplify right side
    994.29x = 514,409.02
  5. Step 5: Solve for x
    x = 514,409.02/994.29
  6. Step 6: Final answer
    x = 517.36

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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.