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Finding the Fourth Proportional to 328,601.40, 491,808.60 and 238,387.65

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Solution

The fourth proportional to 328,601.40, 491,808.60 and 238,387.65 is: 356,788.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,601.40 : 491,808.60 = 238,387.65 : x
  2. Step 2: Convert to fraction form
    328,601.40/491,808.60 = 238,387.65/x
  3. Step 3: Cross multiply
    328,601.40x = 491,808.60 × 238,387.65
  4. Step 4: Simplify right side
    328,601.40x = 117,241,096,403.79
  5. Step 5: Solve for x
    x = 117,241,096,403.79/328,601.40
  6. Step 6: Final answer
    x = 356,788.18

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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.