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Finding the Fourth Proportional to 339,338.37, 509,007 and 86,618.82

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Solution

The fourth proportional to 339,338.37, 509,007 and 86,618.82 is: 129,928.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,338.37 : 509,007 = 86,618.82 : x
  2. Step 2: Convert to fraction form
    339,338.37/509,007 = 86,618.82/x
  3. Step 3: Cross multiply
    339,338.37x = 509,007 × 86,618.82
  4. Step 4: Simplify right side
    339,338.37x = 44,089,585,711.74
  5. Step 5: Solve for x
    x = 44,089,585,711.74/339,338.37
  6. Step 6: Final answer
    x = 129,928.09

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1.5x scale

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.