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Finding the Fourth Proportional to 714,603.72, 986,174.52 and 392,335.56

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Solution

The fourth proportional to 714,603.72, 986,174.52 and 392,335.56 is: 541,434.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,603.72 : 986,174.52 = 392,335.56 : x
  2. Step 2: Convert to fraction form
    714,603.72/986,174.52 = 392,335.56/x
  3. Step 3: Cross multiply
    714,603.72x = 986,174.52 × 392,335.56
  4. Step 4: Simplify right side
    714,603.72x = 386,911,332,561.93
  5. Step 5: Solve for x
    x = 386,911,332,561.93/714,603.72
  6. Step 6: Final answer
    x = 541,434.81

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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.