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Finding the Fourth Proportional to 378,047.70, 567,071.55 and 339,993.90

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Solution

The fourth proportional to 378,047.70, 567,071.55 and 339,993.90 is: 509,990.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,047.70 : 567,071.55 = 339,993.90 : x
  2. Step 2: Convert to fraction form
    378,047.70/567,071.55 = 339,993.90/x
  3. Step 3: Cross multiply
    378,047.70x = 567,071.55 × 339,993.90
  4. Step 4: Simplify right side
    378,047.70x = 192,800,867,863.55
  5. Step 5: Solve for x
    x = 192,800,867,863.55/378,047.70
  6. Step 6: Final answer
    x = 509,990.85

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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.