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Finding the Fourth Proportional to 465.79, 642.77 and 300.17

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Solution

The fourth proportional to 465.79, 642.77 and 300.17 is: 414.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.79 : 642.77 = 300.17 : x
  2. Step 2: Convert to fraction form
    465.79/642.77 = 300.17/x
  3. Step 3: Cross multiply
    465.79x = 642.77 × 300.17
  4. Step 4: Simplify right side
    465.79x = 192,935.56
  5. Step 5: Solve for x
    x = 192,935.56/465.79
  6. Step 6: Final answer
    x = 414.21

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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.