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Finding the Fourth Proportional to 450.16, 672.81 and 385.16

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Solution

The fourth proportional to 450.16, 672.81 and 385.16 is: 575.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.16 : 672.81 = 385.16 : x
  2. Step 2: Convert to fraction form
    450.16/672.81 = 385.16/x
  3. Step 3: Cross multiply
    450.16x = 672.81 × 385.16
  4. Step 4: Simplify right side
    450.16x = 259,134.69
  5. Step 5: Solve for x
    x = 259,134.69/450.16
  6. Step 6: Final answer
    x = 575.65

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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.