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Finding the Fourth Proportional to 398,179, 549,487.05 and 219,331

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Solution

The fourth proportional to 398,179, 549,487.05 and 219,331 is: 302,676.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,179 : 549,487.05 = 219,331 : x
  2. Step 2: Convert to fraction form
    398,179/549,487.05 = 219,331/x
  3. Step 3: Cross multiply
    398,179x = 549,487.05 × 219,331
  4. Step 4: Simplify right side
    398,179x = 120,519,544,163.55
  5. Step 5: Solve for x
    x = 120,519,544,163.55/398,179
  6. Step 6: Final answer
    x = 302,676.80

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.