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Finding the Fourth Proportional to 383,317.25, 528,955.80 and 219,939.17

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Solution

The fourth proportional to 383,317.25, 528,955.80 and 219,939.17 is: 303,503.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,317.25 : 528,955.80 = 219,939.17 : x
  2. Step 2: Convert to fraction form
    383,317.25/528,955.80 = 219,939.17/x
  3. Step 3: Cross multiply
    383,317.25x = 528,955.80 × 219,939.17
  4. Step 4: Simplify right side
    383,317.25x = 116,338,099,618.69
  5. Step 5: Solve for x
    x = 116,338,099,618.69/383,317.25
  6. Step 6: Final answer
    x = 303,503.43

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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.