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Finding the Fourth Proportional to 714,789.06, 986,411.64 and 388,102.56

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Solution

The fourth proportional to 714,789.06, 986,411.64 and 388,102.56 is: 535,583.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,789.06 : 986,411.64 = 388,102.56 : x
  2. Step 2: Convert to fraction form
    714,789.06/986,411.64 = 388,102.56/x
  3. Step 3: Cross multiply
    714,789.06x = 986,411.64 × 388,102.56
  4. Step 4: Simplify right side
    714,789.06x = 382,828,882,697.80
  5. Step 5: Solve for x
    x = 382,828,882,697.80/714,789.06
  6. Step 6: Final answer
    x = 535,583.02

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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.