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Finding the Fourth Proportional to 413.76, 619.83 and 340.86

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Solution

The fourth proportional to 413.76, 619.83 and 340.86 is: 510.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.76 : 619.83 = 340.86 : x
  2. Step 2: Convert to fraction form
    413.76/619.83 = 340.86/x
  3. Step 3: Cross multiply
    413.76x = 619.83 × 340.86
  4. Step 4: Simplify right side
    413.76x = 211,275.25
  5. Step 5: Solve for x
    x = 211,275.25/413.76
  6. Step 6: Final answer
    x = 510.62

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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.