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Finding the Fourth Proportional to 398,500.56, 549,930.78 and 219,652.56

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Solution

The fourth proportional to 398,500.56, 549,930.78 and 219,652.56 is: 303,120.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,500.56 : 549,930.78 = 219,652.56 : x
  2. Step 2: Convert to fraction form
    398,500.56/549,930.78 = 219,652.56/x
  3. Step 3: Cross multiply
    398,500.56x = 549,930.78 × 219,652.56
  4. Step 4: Simplify right side
    398,500.56x = 120,793,703,649.80
  5. Step 5: Solve for x
    x = 120,793,703,649.80/398,500.56
  6. Step 6: Final answer
    x = 303,120.54

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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.