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Finding the Fourth Proportional to 309,161.91, 426,639.50 and 173,193.39

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Solution

The fourth proportional to 309,161.91, 426,639.50 and 173,193.39 is: 239,004.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,161.91 : 426,639.50 = 173,193.39 : x
  2. Step 2: Convert to fraction form
    309,161.91/426,639.50 = 173,193.39/x
  3. Step 3: Cross multiply
    309,161.91x = 426,639.50 × 173,193.39
  4. Step 4: Simplify right side
    309,161.91x = 73,891,142,070.63
  5. Step 5: Solve for x
    x = 73,891,142,070.63/309,161.91
  6. Step 6: Final answer
    x = 239,004.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.