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Finding the Fourth Proportional to 388,686.64, 532,891.34 and 381,601.84

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Solution

The fourth proportional to 388,686.64, 532,891.34 and 381,601.84 is: 523,178.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,686.64 : 532,891.34 = 381,601.84 : x
  2. Step 2: Convert to fraction form
    388,686.64/532,891.34 = 381,601.84/x
  3. Step 3: Cross multiply
    388,686.64x = 532,891.34 × 381,601.84
  4. Step 4: Simplify right side
    388,686.64x = 203,352,315,864.07
  5. Step 5: Solve for x
    x = 203,352,315,864.07/388,686.64
  6. Step 6: Final answer
    x = 523,178.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.