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Finding the Fourth Proportional to 339,647.40, 509,519.70 and 103,008.60

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Solution

The fourth proportional to 339,647.40, 509,519.70 and 103,008.60 is: 154,527.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,647.40 : 509,519.70 = 103,008.60 : x
  2. Step 2: Convert to fraction form
    339,647.40/509,519.70 = 103,008.60/x
  3. Step 3: Cross multiply
    339,647.40x = 509,519.70 × 103,008.60
  4. Step 4: Simplify right side
    339,647.40x = 52,484,910,969.42
  5. Step 5: Solve for x
    x = 52,484,910,969.42/339,647.40
  6. Step 6: Final answer
    x = 154,527.64

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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.