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Finding the Fourth Proportional to 383,906.10, 575,081.55 and 217,499.70

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Solution

The fourth proportional to 383,906.10, 575,081.55 and 217,499.70 is: 325,809.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,906.10 : 575,081.55 = 217,499.70 : x
  2. Step 2: Convert to fraction form
    383,906.10/575,081.55 = 217,499.70/x
  3. Step 3: Cross multiply
    383,906.10x = 575,081.55 × 217,499.70
  4. Step 4: Simplify right side
    383,906.10x = 125,080,064,600.54
  5. Step 5: Solve for x
    x = 125,080,064,600.54/383,906.10
  6. Step 6: Final answer
    x = 325,809.01

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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.