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Finding the Fourth Proportional to 413.19, 619.82 and 207.65

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Solution

The fourth proportional to 413.19, 619.82 and 207.65 is: 311.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.19 : 619.82 = 207.65 : x
  2. Step 2: Convert to fraction form
    413.19/619.82 = 207.65/x
  3. Step 3: Cross multiply
    413.19x = 619.82 × 207.65
  4. Step 4: Simplify right side
    413.19x = 128,701.49
  5. Step 5: Solve for x
    x = 128,701.49/413.19
  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.