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Finding the Fourth Proportional to 714,347.87, 985,860.54 and 392,112.54

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Solution

The fourth proportional to 714,347.87, 985,860.54 and 392,112.54 is: 541,148.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,347.87 : 985,860.54 = 392,112.54 : x
  2. Step 2: Convert to fraction form
    714,347.87/985,860.54 = 392,112.54/x
  3. Step 3: Cross multiply
    714,347.87x = 985,860.54 × 392,112.54
  4. Step 4: Simplify right side
    714,347.87x = 386,568,280,425.17
  5. Step 5: Solve for x
    x = 386,568,280,425.17/714,347.87
  6. Step 6: Final answer
    x = 541,148.51

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1.5x scale

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.