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Finding the Fourth Proportional to 760.14, 1,142.26 and 413.73

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Solution

The fourth proportional to 760.14, 1,142.26 and 413.73 is: 621.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.14 : 1,142.26 = 413.73 : x
  2. Step 2: Convert to fraction form
    760.14/1,142.26 = 413.73/x
  3. Step 3: Cross multiply
    760.14x = 1,142.26 × 413.73
  4. Step 4: Simplify right side
    760.14x = 472,587.23
  5. Step 5: Solve for x
    x = 472,587.23/760.14
  6. Step 6: Final answer
    x = 621.71

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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.