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Finding the Fourth Proportional to 389,628.70, 584,443.05 and 223,279.90

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Solution

The fourth proportional to 389,628.70, 584,443.05 and 223,279.90 is: 334,919.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,628.70 : 584,443.05 = 223,279.90 : x
  2. Step 2: Convert to fraction form
    389,628.70/584,443.05 = 223,279.90/x
  3. Step 3: Cross multiply
    389,628.70x = 584,443.05 × 223,279.90
  4. Step 4: Simplify right side
    389,628.70x = 130,494,385,759.70
  5. Step 5: Solve for x
    x = 130,494,385,759.70/389,628.70
  6. Step 6: Final answer
    x = 334,919.85

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Similar ratio
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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.