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Finding the Fourth Proportional to 207,012.80, 310,519.20 and 205,700.60

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Solution

The fourth proportional to 207,012.80, 310,519.20 and 205,700.60 is: 308,550.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,012.80 : 310,519.20 = 205,700.60 : x
  2. Step 2: Convert to fraction form
    207,012.80/310,519.20 = 205,700.60/x
  3. Step 3: Cross multiply
    207,012.80x = 310,519.20 × 205,700.60
  4. Step 4: Simplify right side
    207,012.80x = 63,873,985,751.52
  5. Step 5: Solve for x
    x = 63,873,985,751.52/207,012.80
  6. Step 6: Final answer
    x = 308,550.90

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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.