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Finding the Fourth Proportional to 207,762.80, 311,644.20 and 172,333.40

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Solution

The fourth proportional to 207,762.80, 311,644.20 and 172,333.40 is: 258,500.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,762.80 : 311,644.20 = 172,333.40 : x
  2. Step 2: Convert to fraction form
    207,762.80/311,644.20 = 172,333.40/x
  3. Step 3: Cross multiply
    207,762.80x = 311,644.20 × 172,333.40
  4. Step 4: Simplify right side
    207,762.80x = 53,706,704,576.28
  5. Step 5: Solve for x
    x = 53,706,704,576.28/207,762.80
  6. Step 6: Final answer
    x = 258,500.10

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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.