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Finding the Fourth Proportional to 338,410.80, 507,616.20 and 212,439.60

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Solution

The fourth proportional to 338,410.80, 507,616.20 and 212,439.60 is: 318,659.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,410.80 : 507,616.20 = 212,439.60 : x
  2. Step 2: Convert to fraction form
    338,410.80/507,616.20 = 212,439.60/x
  3. Step 3: Cross multiply
    338,410.80x = 507,616.20 × 212,439.60
  4. Step 4: Simplify right side
    338,410.80x = 107,837,782,481.52
  5. Step 5: Solve for x
    x = 107,837,782,481.52/338,410.80
  6. Step 6: Final answer
    x = 318,659.40

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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.