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Finding the Fourth Proportional to 669,364, 923,629.36 and 393,734.34

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Solution

The fourth proportional to 669,364, 923,629.36 and 393,734.34 is: 543,298.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,364 : 923,629.36 = 393,734.34 : x
  2. Step 2: Convert to fraction form
    669,364/923,629.36 = 393,734.34/x
  3. Step 3: Cross multiply
    669,364x = 923,629.36 × 393,734.34
  4. Step 4: Simplify right side
    669,364x = 363,664,596,464.22
  5. Step 5: Solve for x
    x = 363,664,596,464.22/669,364
  6. Step 6: Final answer
    x = 543,298.71

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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.