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Finding the Fourth Proportional to 465.63, 642.35 and 299.79

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Solution

The fourth proportional to 465.63, 642.35 and 299.79 is: 413.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.63 : 642.35 = 299.79 : x
  2. Step 2: Convert to fraction form
    465.63/642.35 = 299.79/x
  3. Step 3: Cross multiply
    465.63x = 642.35 × 299.79
  4. Step 4: Simplify right side
    465.63x = 192,568.61
  5. Step 5: Solve for x
    x = 192,568.61/465.63
  6. Step 6: Final answer
    x = 413.57

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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.