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Finding the Fourth Proportional to 259,325.40, 389,279.70 and 200,422.20

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Solution

The fourth proportional to 259,325.40, 389,279.70 and 200,422.20 is: 300,858.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,325.40 : 389,279.70 = 200,422.20 : x
  2. Step 2: Convert to fraction form
    259,325.40/389,279.70 = 200,422.20/x
  3. Step 3: Cross multiply
    259,325.40x = 389,279.70 × 200,422.20
  4. Step 4: Simplify right side
    259,325.40x = 78,020,293,889.34
  5. Step 5: Solve for x
    x = 78,020,293,889.34/259,325.40
  6. Step 6: Final answer
    x = 300,858.67

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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.