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Finding the Fourth Proportional to 207,011.20, 310,516.80 and 193,889.20

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Solution

The fourth proportional to 207,011.20, 310,516.80 and 193,889.20 is: 290,833.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,011.20 : 310,516.80 = 193,889.20 : x
  2. Step 2: Convert to fraction form
    207,011.20/310,516.80 = 193,889.20/x
  3. Step 3: Cross multiply
    207,011.20x = 310,516.80 × 193,889.20
  4. Step 4: Simplify right side
    207,011.20x = 60,205,853,938.56
  5. Step 5: Solve for x
    x = 60,205,853,938.56/207,011.20
  6. Step 6: Final answer
    x = 290,833.80

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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.