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Finding the Fourth Proportional to 995.23, 1,491.99 and 345.88

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Solution

The fourth proportional to 995.23, 1,491.99 and 345.88 is: 518.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.23 : 1,491.99 = 345.88 : x
  2. Step 2: Convert to fraction form
    995.23/1,491.99 = 345.88/x
  3. Step 3: Cross multiply
    995.23x = 1,491.99 × 345.88
  4. Step 4: Simplify right side
    995.23x = 516,049.50
  5. Step 5: Solve for x
    x = 516,049.50/995.23
  6. Step 6: Final answer
    x = 518.52

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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.