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Finding the Fourth Proportional to 518,729.88, 778,094.88 and 400,573.56

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Solution

The fourth proportional to 518,729.88, 778,094.88 and 400,573.56 is: 600,860.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,729.88 : 778,094.88 = 400,573.56 : x
  2. Step 2: Convert to fraction form
    518,729.88/778,094.88 = 400,573.56/x
  3. Step 3: Cross multiply
    518,729.88x = 778,094.88 × 400,573.56
  4. Step 4: Simplify right side
    518,729.88x = 311,684,236,099.37
  5. Step 5: Solve for x
    x = 311,684,236,099.37/518,729.88
  6. Step 6: Final answer
    x = 600,860.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.