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Finding the Fourth Proportional to 517.55, 772.60 and 443.63

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Solution

The fourth proportional to 517.55, 772.60 and 443.63 is: 662.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.55 : 772.60 = 443.63 : x
  2. Step 2: Convert to fraction form
    517.55/772.60 = 443.63/x
  3. Step 3: Cross multiply
    517.55x = 772.60 × 443.63
  4. Step 4: Simplify right side
    517.55x = 342,743.57
  5. Step 5: Solve for x
    x = 342,743.57/517.55
  6. Step 6: Final answer
    x = 662.25

Related Problems

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Double scale
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1.5x scale

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.