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Finding the Fourth Proportional to 207,669.20, 311,503.80 and 205,700.90

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Solution

The fourth proportional to 207,669.20, 311,503.80 and 205,700.90 is: 308,551.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,669.20 : 311,503.80 = 205,700.90 : x
  2. Step 2: Convert to fraction form
    207,669.20/311,503.80 = 205,700.90/x
  3. Step 3: Cross multiply
    207,669.20x = 311,503.80 × 205,700.90
  4. Step 4: Simplify right side
    207,669.20x = 64,076,612,013.42
  5. Step 5: Solve for x
    x = 64,076,612,013.42/207,669.20
  6. Step 6: Final answer
    x = 308,551.35

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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.