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Finding the Fourth Proportional to 486.55, 732.85 and 443.53

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Solution

The fourth proportional to 486.55, 732.85 and 443.53 is: 668.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.55 : 732.85 = 443.53 : x
  2. Step 2: Convert to fraction form
    486.55/732.85 = 443.53/x
  3. Step 3: Cross multiply
    486.55x = 732.85 × 443.53
  4. Step 4: Simplify right side
    486.55x = 325,040.96
  5. Step 5: Solve for x
    x = 325,040.96/486.55
  6. Step 6: Final answer
    x = 668.05

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.