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Finding the Fourth Proportional to 413.12, 619.86 and 124.58

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Solution

The fourth proportional to 413.12, 619.86 and 124.58 is: 186.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.12 : 619.86 = 124.58 : x
  2. Step 2: Convert to fraction form
    413.12/619.86 = 124.58/x
  3. Step 3: Cross multiply
    413.12x = 619.86 × 124.58
  4. Step 4: Simplify right side
    413.12x = 77,222.16
  5. Step 5: Solve for x
    x = 77,222.16/413.12
  6. Step 6: Final answer
    x = 186.92

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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.