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Finding the Fourth Proportional to 208,812.20, 313,218.30 and 200,647.40

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Solution

The fourth proportional to 208,812.20, 313,218.30 and 200,647.40 is: 300,971.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,812.20 : 313,218.30 = 200,647.40 : x
  2. Step 2: Convert to fraction form
    208,812.20/313,218.30 = 200,647.40/x
  3. Step 3: Cross multiply
    208,812.20x = 313,218.30 × 200,647.40
  4. Step 4: Simplify right side
    208,812.20x = 62,846,437,527.42
  5. Step 5: Solve for x
    x = 62,846,437,527.42/208,812.20
  6. Step 6: Final answer
    x = 300,971.10

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1.5x scale

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.