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Finding the Fourth Proportional to 339,700.20, 509,550.30 and 261,210.60

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Solution

The fourth proportional to 339,700.20, 509,550.30 and 261,210.60 is: 391,815.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,700.20 : 509,550.30 = 261,210.60 : x
  2. Step 2: Convert to fraction form
    339,700.20/509,550.30 = 261,210.60/x
  3. Step 3: Cross multiply
    339,700.20x = 509,550.30 × 261,210.60
  4. Step 4: Simplify right side
    339,700.20x = 133,099,939,593.18
  5. Step 5: Solve for x
    x = 133,099,939,593.18/339,700.20
  6. Step 6: Final answer
    x = 391,815.90

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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.