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Finding the Fourth Proportional to 413.43, 570.38 and 257.91

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Solution

The fourth proportional to 413.43, 570.38 and 257.91 is: 355.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.43 : 570.38 = 257.91 : x
  2. Step 2: Convert to fraction form
    413.43/570.38 = 257.91/x
  3. Step 3: Cross multiply
    413.43x = 570.38 × 257.91
  4. Step 4: Simplify right side
    413.43x = 147,105.42
  5. Step 5: Solve for x
    x = 147,105.42/413.43
  6. Step 6: Final answer
    x = 355.82

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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.