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Finding the Fourth Proportional to 208,031.70, 311,865.30 and 141,255.30

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Solution

The fourth proportional to 208,031.70, 311,865.30 and 141,255.30 is: 211,759.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,031.70 : 311,865.30 = 141,255.30 : x
  2. Step 2: Convert to fraction form
    208,031.70/311,865.30 = 141,255.30/x
  3. Step 3: Cross multiply
    208,031.70x = 311,865.30 × 141,255.30
  4. Step 4: Simplify right side
    208,031.70x = 44,052,626,511.09
  5. Step 5: Solve for x
    x = 44,052,626,511.09/208,031.70
  6. Step 6: Final answer
    x = 211,759.20

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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.