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Finding the Fourth Proportional to 559.80, 772.62 and 413.20

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Solution

The fourth proportional to 559.80, 772.62 and 413.20 is: 570.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.80 : 772.62 = 413.20 : x
  2. Step 2: Convert to fraction form
    559.80/772.62 = 413.20/x
  3. Step 3: Cross multiply
    559.80x = 772.62 × 413.20
  4. Step 4: Simplify right side
    559.80x = 319,246.58
  5. Step 5: Solve for x
    x = 319,246.58/559.80
  6. Step 6: Final answer
    x = 570.29

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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.