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Finding the Fourth Proportional to 626,438.50, 864,485.75 and 339,958.65

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Solution

The fourth proportional to 626,438.50, 864,485.75 and 339,958.65 is: 469,143.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,438.50 : 864,485.75 = 339,958.65 : x
  2. Step 2: Convert to fraction form
    626,438.50/864,485.75 = 339,958.65/x
  3. Step 3: Cross multiply
    626,438.50x = 864,485.75 × 339,958.65
  4. Step 4: Simplify right side
    626,438.50x = 293,889,408,514.24
  5. Step 5: Solve for x
    x = 293,889,408,514.24/626,438.50
  6. Step 6: Final answer
    x = 469,143.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.