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Finding the Fourth Proportional to 413.81, 571.10 and 256.55

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Solution

The fourth proportional to 413.81, 571.10 and 256.55 is: 354.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.81 : 571.10 = 256.55 : x
  2. Step 2: Convert to fraction form
    413.81/571.10 = 256.55/x
  3. Step 3: Cross multiply
    413.81x = 571.10 × 256.55
  4. Step 4: Simplify right side
    413.81x = 146,511.57
  5. Step 5: Solve for x
    x = 146,511.57/413.81
  6. Step 6: Final answer
    x = 354.06

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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.