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Finding the Fourth Proportional to 993.26, 1,490.22 and 335.20

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Solution

The fourth proportional to 993.26, 1,490.22 and 335.20 is: 502.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.26 : 1,490.22 = 335.20 : x
  2. Step 2: Convert to fraction form
    993.26/1,490.22 = 335.20/x
  3. Step 3: Cross multiply
    993.26x = 1,490.22 × 335.20
  4. Step 4: Simplify right side
    993.26x = 499,521.74
  5. Step 5: Solve for x
    x = 499,521.74/993.26
  6. Step 6: Final answer
    x = 502.91

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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.