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Finding the Fourth Proportional to 338,388.58, 507,586.38 and 136,078.30

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Solution

The fourth proportional to 338,388.58, 507,586.38 and 136,078.30 is: 204,118.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,388.58 : 507,586.38 = 136,078.30 : x
  2. Step 2: Convert to fraction form
    338,388.58/507,586.38 = 136,078.30/x
  3. Step 3: Cross multiply
    338,388.58x = 507,586.38 × 136,078.30
  4. Step 4: Simplify right side
    338,388.58x = 69,071,491,693.55
  5. Step 5: Solve for x
    x = 69,071,491,693.55/338,388.58
  6. Step 6: Final answer
    x = 204,118.86

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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.