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Finding the Fourth Proportional to 993.01, 1,489.32 and 444.91

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Solution

The fourth proportional to 993.01, 1,489.32 and 444.91 is: 667.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.01 : 1,489.32 = 444.91 : x
  2. Step 2: Convert to fraction form
    993.01/1,489.32 = 444.91/x
  3. Step 3: Cross multiply
    993.01x = 1,489.32 × 444.91
  4. Step 4: Simplify right side
    993.01x = 662,613.36
  5. Step 5: Solve for x
    x = 662,613.36/993.01
  6. Step 6: Final answer
    x = 667.28

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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.