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Finding the Fourth Proportional to 714,519.63, 986,033.12 and 392,235.21

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Solution

The fourth proportional to 714,519.63, 986,033.12 and 392,235.21 is: 541,282.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,519.63 : 986,033.12 = 392,235.21 : x
  2. Step 2: Convert to fraction form
    714,519.63/986,033.12 = 392,235.21/x
  3. Step 3: Cross multiply
    714,519.63x = 986,033.12 × 392,235.21
  4. Step 4: Simplify right side
    714,519.63x = 386,756,905,928.98
  5. Step 5: Solve for x
    x = 386,756,905,928.98/714,519.63
  6. Step 6: Final answer
    x = 541,282.41

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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.