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Finding the Fourth Proportional to 659,136.33, 909,615.31 and 387,215.69

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Solution

The fourth proportional to 659,136.33, 909,615.31 and 387,215.69 is: 534,361.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,136.33 : 909,615.31 = 387,215.69 : x
  2. Step 2: Convert to fraction form
    659,136.33/909,615.31 = 387,215.69/x
  3. Step 3: Cross multiply
    659,136.33x = 909,615.31 × 387,215.69
  4. Step 4: Simplify right side
    659,136.33x = 352,217,315,348.14
  5. Step 5: Solve for x
    x = 352,217,315,348.14/659,136.33
  6. Step 6: Final answer
    x = 534,361.86

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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.