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Finding the Fourth Proportional to 383,519.79, 529,260.74 and 211,443.87

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Solution

The fourth proportional to 383,519.79, 529,260.74 and 211,443.87 is: 291,794.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,519.79 : 529,260.74 = 211,443.87 : x
  2. Step 2: Convert to fraction form
    383,519.79/529,260.74 = 211,443.87/x
  3. Step 3: Cross multiply
    383,519.79x = 529,260.74 × 211,443.87
  4. Step 4: Simplify right side
    383,519.79x = 111,908,938,047.44
  5. Step 5: Solve for x
    x = 111,908,938,047.44/383,519.79
  6. Step 6: Final answer
    x = 291,794.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.