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Finding the Fourth Proportional to 995.10, 1,491.48 and 475.20

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Solution

The fourth proportional to 995.10, 1,491.48 and 475.20 is: 712.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.10 : 1,491.48 = 475.20 : x
  2. Step 2: Convert to fraction form
    995.10/1,491.48 = 475.20/x
  3. Step 3: Cross multiply
    995.10x = 1,491.48 × 475.20
  4. Step 4: Simplify right side
    995.10x = 708,751.30
  5. Step 5: Solve for x
    x = 708,751.30/995.10
  6. Step 6: Final answer
    x = 712.24

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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.