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Finding the Fourth Proportional to 339,717.40, 509,624.70 and 103,078.60

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Solution

The fourth proportional to 339,717.40, 509,624.70 and 103,078.60 is: 154,632.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,717.40 : 509,624.70 = 103,078.60 : x
  2. Step 2: Convert to fraction form
    339,717.40/509,624.70 = 103,078.60/x
  3. Step 3: Cross multiply
    339,717.40x = 509,624.70 × 103,078.60
  4. Step 4: Simplify right side
    339,717.40x = 52,531,400,601.42
  5. Step 5: Solve for x
    x = 52,531,400,601.42/339,717.40
  6. Step 6: Final answer
    x = 154,632.65

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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.