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Finding the Fourth Proportional to 460.74, 636.24 and 313.74

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Solution

The fourth proportional to 460.74, 636.24 and 313.74 is: 433.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.74 : 636.24 = 313.74 : x
  2. Step 2: Convert to fraction form
    460.74/636.24 = 313.74/x
  3. Step 3: Cross multiply
    460.74x = 636.24 × 313.74
  4. Step 4: Simplify right side
    460.74x = 199,613.94
  5. Step 5: Solve for x
    x = 199,613.94/460.74
  6. Step 6: Final answer
    x = 433.25

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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.