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Finding the Fourth Proportional to 276,820.60, 414,971.70 and 216,815.80

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Solution

The fourth proportional to 276,820.60, 414,971.70 and 216,815.80 is: 325,020.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,820.60 : 414,971.70 = 216,815.80 : x
  2. Step 2: Convert to fraction form
    276,820.60/414,971.70 = 216,815.80/x
  3. Step 3: Cross multiply
    276,820.60x = 414,971.70 × 216,815.80
  4. Step 4: Simplify right side
    276,820.60x = 89,972,421,112.86
  5. Step 5: Solve for x
    x = 89,972,421,112.86/276,820.60
  6. Step 6: Final answer
    x = 325,020.69

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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.