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Finding the Fourth Proportional to 518,063.88, 714,912.36 and 288,621.06

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Solution

The fourth proportional to 518,063.88, 714,912.36 and 288,621.06 is: 398,288.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,063.88 : 714,912.36 = 288,621.06 : x
  2. Step 2: Convert to fraction form
    518,063.88/714,912.36 = 288,621.06/x
  3. Step 3: Cross multiply
    518,063.88x = 714,912.36 × 288,621.06
  4. Step 4: Simplify right side
    518,063.88x = 206,338,763,150.30
  5. Step 5: Solve for x
    x = 206,338,763,150.30/518,063.88
  6. Step 6: Final answer
    x = 398,288.26

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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.