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Finding the Fourth Proportional to 714,295.76, 985,725.05 and 392,011.07

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Solution

The fourth proportional to 714,295.76, 985,725.05 and 392,011.07 is: 540,973.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,295.76 : 985,725.05 = 392,011.07 : x
  2. Step 2: Convert to fraction form
    714,295.76/985,725.05 = 392,011.07/x
  3. Step 3: Cross multiply
    714,295.76x = 985,725.05 × 392,011.07
  4. Step 4: Simplify right side
    714,295.76x = 386,415,124,687.62
  5. Step 5: Solve for x
    x = 386,415,124,687.62/714,295.76
  6. Step 6: Final answer
    x = 540,973.57

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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.