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Finding the Fourth Proportional to 413.06, 619.13 and 207.81

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Solution

The fourth proportional to 413.06, 619.13 and 207.81 is: 311.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.06 : 619.13 = 207.81 : x
  2. Step 2: Convert to fraction form
    413.06/619.13 = 207.81/x
  3. Step 3: Cross multiply
    413.06x = 619.13 × 207.81
  4. Step 4: Simplify right side
    413.06x = 128,661.92
  5. Step 5: Solve for x
    x = 128,661.92/413.06
  6. Step 6: Final answer
    x = 311.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.