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Finding the Fourth Proportional to 1,235.42, 1,852.57 and 413.47

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Solution

The fourth proportional to 1,235.42, 1,852.57 and 413.47 is: 620.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235.42 : 1,852.57 = 413.47 : x
  2. Step 2: Convert to fraction form
    1,235.42/1,852.57 = 413.47/x
  3. Step 3: Cross multiply
    1,235.42x = 1,852.57 × 413.47
  4. Step 4: Simplify right side
    1,235.42x = 765,982.12
  5. Step 5: Solve for x
    x = 765,982.12/1,235.42
  6. Step 6: Final answer
    x = 620.02

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1.5x scale

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.