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Finding the Fourth Proportional to 207,813.40, 311,720.10 and 163,576.60

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Solution

The fourth proportional to 207,813.40, 311,720.10 and 163,576.60 is: 245,364.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,813.40 : 311,720.10 = 163,576.60 : x
  2. Step 2: Convert to fraction form
    207,813.40/311,720.10 = 163,576.60/x
  3. Step 3: Cross multiply
    207,813.40x = 311,720.10 × 163,576.60
  4. Step 4: Simplify right side
    207,813.40x = 50,990,114,109.66
  5. Step 5: Solve for x
    x = 50,990,114,109.66/207,813.40
  6. Step 6: Final answer
    x = 245,364.90

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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.