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Finding the Fourth Proportional to 486.07, 670.65 and 299.65

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Solution

The fourth proportional to 486.07, 670.65 and 299.65 is: 413.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.07 : 670.65 = 299.65 : x
  2. Step 2: Convert to fraction form
    486.07/670.65 = 299.65/x
  3. Step 3: Cross multiply
    486.07x = 670.65 × 299.65
  4. Step 4: Simplify right side
    486.07x = 200,960.27
  5. Step 5: Solve for x
    x = 200,960.27/486.07
  6. Step 6: Final answer
    x = 413.44

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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.