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Finding the Fourth Proportional to 345.25, 516.93 and 276.40

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Solution

The fourth proportional to 345.25, 516.93 and 276.40 is: 413.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.25 : 516.93 = 276.40 : x
  2. Step 2: Convert to fraction form
    345.25/516.93 = 276.40/x
  3. Step 3: Cross multiply
    345.25x = 516.93 × 276.40
  4. Step 4: Simplify right side
    345.25x = 142,879.45
  5. Step 5: Solve for x
    x = 142,879.45/345.25
  6. Step 6: Final answer
    x = 413.84

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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.