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Finding the Fourth Proportional to 339,716.40, 509,509.80 and 103,066.80

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Solution

The fourth proportional to 339,716.40, 509,509.80 and 103,066.80 is: 154,580.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,716.40 : 509,509.80 = 103,066.80 : x
  2. Step 2: Convert to fraction form
    339,716.40/509,509.80 = 103,066.80/x
  3. Step 3: Cross multiply
    339,716.40x = 509,509.80 × 103,066.80
  4. Step 4: Simplify right side
    339,716.40x = 52,513,544,654.64
  5. Step 5: Solve for x
    x = 52,513,544,654.64/339,716.40
  6. Step 6: Final answer
    x = 154,580.54

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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.