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Finding the Fourth Proportional to 939,864.86, 1,296,978.83 and 510,135.75

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Solution

The fourth proportional to 939,864.86, 1,296,978.83 and 510,135.75 is: 703,968.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    939,864.86 : 1,296,978.83 = 510,135.75 : x
  2. Step 2: Convert to fraction form
    939,864.86/1,296,978.83 = 510,135.75/x
  3. Step 3: Cross multiply
    939,864.86x = 1,296,978.83 × 510,135.75
  4. Step 4: Simplify right side
    939,864.86x = 661,635,265,625.49
  5. Step 5: Solve for x
    x = 661,635,265,625.49/939,864.86
  6. Step 6: Final answer
    x = 703,968.51

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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.