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Finding the Fourth Proportional to 993.35, 1,490.19 and 335.28

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Solution

The fourth proportional to 993.35, 1,490.19 and 335.28 is: 502.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.35 : 1,490.19 = 335.28 : x
  2. Step 2: Convert to fraction form
    993.35/1,490.19 = 335.28/x
  3. Step 3: Cross multiply
    993.35x = 1,490.19 × 335.28
  4. Step 4: Simplify right side
    993.35x = 499,630.90
  5. Step 5: Solve for x
    x = 499,630.90/993.35
  6. Step 6: Final answer
    x = 502.98

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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.