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Finding the Fourth Proportional to 661,665.14, 988,015.96 and 525,198.13

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Solution

The fourth proportional to 661,665.14, 988,015.96 and 525,198.13 is: 784,239.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,665.14 : 988,015.96 = 525,198.13 : x
  2. Step 2: Convert to fraction form
    661,665.14/988,015.96 = 525,198.13/x
  3. Step 3: Cross multiply
    661,665.14x = 988,015.96 × 525,198.13
  4. Step 4: Simplify right side
    661,665.14x = 518,904,132,788.61
  5. Step 5: Solve for x
    x = 518,904,132,788.61/661,665.14
  6. Step 6: Final answer
    x = 784,239.80

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.