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Finding the Fourth Proportional to 994.29, 1,490.49 and 751.91

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Solution

The fourth proportional to 994.29, 1,490.49 and 751.91 is: 1,127.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.29 : 1,490.49 = 751.91 : x
  2. Step 2: Convert to fraction form
    994.29/1,490.49 = 751.91/x
  3. Step 3: Cross multiply
    994.29x = 1,490.49 × 751.91
  4. Step 4: Simplify right side
    994.29x = 1,120,706.88
  5. Step 5: Solve for x
    x = 1,120,706.88/994.29
  6. Step 6: Final answer
    x = 1,127.14

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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.