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Finding the Fourth Proportional to 413.46, 571.05 and 347.31

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Solution

The fourth proportional to 413.46, 571.05 and 347.31 is: 479.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.46 : 571.05 = 347.31 : x
  2. Step 2: Convert to fraction form
    413.46/571.05 = 347.31/x
  3. Step 3: Cross multiply
    413.46x = 571.05 × 347.31
  4. Step 4: Simplify right side
    413.46x = 198,331.38
  5. Step 5: Solve for x
    x = 198,331.38/413.46
  6. Step 6: Final answer
    x = 479.69

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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.