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Finding the Fourth Proportional to 517,179.38, 775,622.05 and 217,728.05

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Solution

The fourth proportional to 517,179.38, 775,622.05 and 217,728.05 is: 326,530.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,179.38 : 775,622.05 = 217,728.05 : x
  2. Step 2: Convert to fraction form
    517,179.38/775,622.05 = 217,728.05/x
  3. Step 3: Cross multiply
    517,179.38x = 775,622.05 × 217,728.05
  4. Step 4: Simplify right side
    517,179.38x = 168,874,672,061.07
  5. Step 5: Solve for x
    x = 168,874,672,061.07/517,179.38
  6. Step 6: Final answer
    x = 326,530.18

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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.