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Finding the Fourth Proportional to 993.57, 1,490.30 and 300.23

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Solution

The fourth proportional to 993.57, 1,490.30 and 300.23 is: 450.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.57 : 1,490.30 = 300.23 : x
  2. Step 2: Convert to fraction form
    993.57/1,490.30 = 300.23/x
  3. Step 3: Cross multiply
    993.57x = 1,490.30 × 300.23
  4. Step 4: Simplify right side
    993.57x = 447,434.72
  5. Step 5: Solve for x
    x = 447,434.72/993.57
  6. Step 6: Final answer
    x = 450.33

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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.