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Finding the Fourth Proportional to 661,057.79, 991,587.02 and 436,365.71

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Solution

The fourth proportional to 661,057.79, 991,587.02 and 436,365.71 is: 654,548.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,057.79 : 991,587.02 = 436,365.71 : x
  2. Step 2: Convert to fraction form
    661,057.79/991,587.02 = 436,365.71/x
  3. Step 3: Cross multiply
    661,057.79x = 991,587.02 × 436,365.71
  4. Step 4: Simplify right side
    661,057.79x = 432,694,571,827.26
  5. Step 5: Solve for x
    x = 432,694,571,827.26/661,057.79
  6. Step 6: Final answer
    x = 654,548.78

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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.