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Finding the Fourth Proportional to 995.99, 1,494.23 and 418.91

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Solution

The fourth proportional to 995.99, 1,494.23 and 418.91 is: 628.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.99 : 1,494.23 = 418.91 : x
  2. Step 2: Convert to fraction form
    995.99/1,494.23 = 418.91/x
  3. Step 3: Cross multiply
    995.99x = 1,494.23 × 418.91
  4. Step 4: Simplify right side
    995.99x = 625,951.10
  5. Step 5: Solve for x
    x = 625,951.10/995.99
  6. Step 6: Final answer
    x = 628.47

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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.