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Finding the Fourth Proportional to 751.04, 1,120.36 and 636.20

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Solution

The fourth proportional to 751.04, 1,120.36 and 636.20 is: 949.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.04 : 1,120.36 = 636.20 : x
  2. Step 2: Convert to fraction form
    751.04/1,120.36 = 636.20/x
  3. Step 3: Cross multiply
    751.04x = 1,120.36 × 636.20
  4. Step 4: Simplify right side
    751.04x = 712,773.03
  5. Step 5: Solve for x
    x = 712,773.03/751.04
  6. Step 6: Final answer
    x = 949.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.