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Finding the Fourth Proportional to 207,287.20, 311,007.60 and 199,607.20

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Solution

The fourth proportional to 207,287.20, 311,007.60 and 199,607.20 is: 299,484.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,287.20 : 311,007.60 = 199,607.20 : x
  2. Step 2: Convert to fraction form
    207,287.20/311,007.60 = 199,607.20/x
  3. Step 3: Cross multiply
    207,287.20x = 311,007.60 × 199,607.20
  4. Step 4: Simplify right side
    207,287.20x = 62,079,356,214.72
  5. Step 5: Solve for x
    x = 62,079,356,214.72/207,287.20
  6. Step 6: Final answer
    x = 299,484.75

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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.