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Finding the Fourth Proportional to 206,895.80, 310,343.70 and 154,407.80

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Solution

The fourth proportional to 206,895.80, 310,343.70 and 154,407.80 is: 231,611.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,895.80 : 310,343.70 = 154,407.80 : x
  2. Step 2: Convert to fraction form
    206,895.80/310,343.70 = 154,407.80/x
  3. Step 3: Cross multiply
    206,895.80x = 310,343.70 × 154,407.80
  4. Step 4: Simplify right side
    206,895.80x = 47,919,487,960.86
  5. Step 5: Solve for x
    x = 47,919,487,960.86/206,895.80
  6. Step 6: Final answer
    x = 231,611.70

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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.