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Finding the Fourth Proportional to 714,999.96, 986,711.80 and 392,739.84

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Solution

The fourth proportional to 714,999.96, 986,711.80 and 392,739.84 is: 541,987.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,999.96 : 986,711.80 = 392,739.84 : x
  2. Step 2: Convert to fraction form
    714,999.96/986,711.80 = 392,739.84/x
  3. Step 3: Cross multiply
    714,999.96x = 986,711.80 × 392,739.84
  4. Step 4: Simplify right side
    714,999.96x = 387,521,034,458.11
  5. Step 5: Solve for x
    x = 387,521,034,458.11/714,999.96
  6. Step 6: Final answer
    x = 541,987.49

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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.