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Finding the Fourth Proportional to 1,235.41, 1,853.21 and 413.71

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Solution

The fourth proportional to 1,235.41, 1,853.21 and 413.71 is: 620.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235.41 : 1,853.21 = 413.71 : x
  2. Step 2: Convert to fraction form
    1,235.41/1,853.21 = 413.71/x
  3. Step 3: Cross multiply
    1,235.41x = 1,853.21 × 413.71
  4. Step 4: Simplify right side
    1,235.41x = 766,687.91
  5. Step 5: Solve for x
    x = 766,687.91/1,235.41
  6. Step 6: Final answer
    x = 620.60

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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.