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Finding the Fourth Proportional to 751.16, 1,125.95 and 443.16

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Solution

The fourth proportional to 751.16, 1,125.95 and 443.16 is: 664.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.16 : 1,125.95 = 443.16 : x
  2. Step 2: Convert to fraction form
    751.16/1,125.95 = 443.16/x
  3. Step 3: Cross multiply
    751.16x = 1,125.95 × 443.16
  4. Step 4: Simplify right side
    751.16x = 498,977.56
  5. Step 5: Solve for x
    x = 498,977.56/751.16
  6. Step 6: Final answer
    x = 664.27

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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.