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Finding the Fourth Proportional to 338,450.73, 507,676.76 and 85,731.27

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Solution

The fourth proportional to 338,450.73, 507,676.76 and 85,731.27 is: 128,597.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,450.73 : 507,676.76 = 85,731.27 : x
  2. Step 2: Convert to fraction form
    338,450.73/507,676.76 = 85,731.27/x
  3. Step 3: Cross multiply
    338,450.73x = 507,676.76 × 85,731.27
  4. Step 4: Simplify right side
    338,450.73x = 43,523,773,384.29
  5. Step 5: Solve for x
    x = 43,523,773,384.29/338,450.73
  6. Step 6: Final answer
    x = 128,597.07

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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.