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Finding the Fourth Proportional to 426,674.63, 640,361.87 and 216,372.71

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Solution

The fourth proportional to 426,674.63, 640,361.87 and 216,372.71 is: 324,736.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,674.63 : 640,361.87 = 216,372.71 : x
  2. Step 2: Convert to fraction form
    426,674.63/640,361.87 = 216,372.71/x
  3. Step 3: Cross multiply
    426,674.63x = 640,361.87 × 216,372.71
  4. Step 4: Simplify right side
    426,674.63x = 138,556,833,192.57
  5. Step 5: Solve for x
    x = 138,556,833,192.57/426,674.63
  6. Step 6: Final answer
    x = 324,736.52

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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.