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Finding the Fourth Proportional to 207,638.40, 311,020.20 and 168,272.40

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Solution

The fourth proportional to 207,638.40, 311,020.20 and 168,272.40 is: 252,054.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,638.40 : 311,020.20 = 168,272.40 : x
  2. Step 2: Convert to fraction form
    207,638.40/311,020.20 = 168,272.40/x
  3. Step 3: Cross multiply
    207,638.40x = 311,020.20 × 168,272.40
  4. Step 4: Simplify right side
    207,638.40x = 52,336,115,502.48
  5. Step 5: Solve for x
    x = 52,336,115,502.48/207,638.40
  6. Step 6: Final answer
    x = 252,054.13

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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.