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Finding the Fourth Proportional to 306,130.87, 422,431.60 and 170,148.67

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Solution

The fourth proportional to 306,130.87, 422,431.60 and 170,148.67 is: 234,789.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,130.87 : 422,431.60 = 170,148.67 : x
  2. Step 2: Convert to fraction form
    306,130.87/422,431.60 = 170,148.67/x
  3. Step 3: Cross multiply
    306,130.87x = 422,431.60 × 170,148.67
  4. Step 4: Simplify right side
    306,130.87x = 71,876,174,905.97
  5. Step 5: Solve for x
    x = 71,876,174,905.97/306,130.87
  6. Step 6: Final answer
    x = 234,789.05

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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.