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Finding the Fourth Proportional to 743.55, 1,025.91 and 481.25

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Solution

The fourth proportional to 743.55, 1,025.91 and 481.25 is: 664.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.55 : 1,025.91 = 481.25 : x
  2. Step 2: Convert to fraction form
    743.55/1,025.91 = 481.25/x
  3. Step 3: Cross multiply
    743.55x = 1,025.91 × 481.25
  4. Step 4: Simplify right side
    743.55x = 493,719.19
  5. Step 5: Solve for x
    x = 493,719.19/743.55
  6. Step 6: Final answer
    x = 664.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.