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Finding the Fourth Proportional to 208,211.40, 312,244.20 and 108,338.40

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Solution

The fourth proportional to 208,211.40, 312,244.20 and 108,338.40 is: 162,469.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,211.40 : 312,244.20 = 108,338.40 : x
  2. Step 2: Convert to fraction form
    208,211.40/312,244.20 = 108,338.40/x
  3. Step 3: Cross multiply
    208,211.40x = 312,244.20 × 108,338.40
  4. Step 4: Simplify right side
    208,211.40x = 33,828,037,037.28
  5. Step 5: Solve for x
    x = 33,828,037,037.28/208,211.40
  6. Step 6: Final answer
    x = 162,469.67

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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.