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Finding the Fourth Proportional to 228,912.20, 343,368.30 and 216,009.80

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Solution

The fourth proportional to 228,912.20, 343,368.30 and 216,009.80 is: 324,014.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,912.20 : 343,368.30 = 216,009.80 : x
  2. Step 2: Convert to fraction form
    228,912.20/343,368.30 = 216,009.80/x
  3. Step 3: Cross multiply
    228,912.20x = 343,368.30 × 216,009.80
  4. Step 4: Simplify right side
    228,912.20x = 74,170,917,809.34
  5. Step 5: Solve for x
    x = 74,170,917,809.34/228,912.20
  6. Step 6: Final answer
    x = 324,014.70

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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.