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Finding the Fourth Proportional to 306,346.55, 422,695.67 and 178,997.54

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Solution

The fourth proportional to 306,346.55, 422,695.67 and 178,997.54 is: 246,980.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,346.55 : 422,695.67 = 178,997.54 : x
  2. Step 2: Convert to fraction form
    306,346.55/422,695.67 = 178,997.54/x
  3. Step 3: Cross multiply
    306,346.55x = 422,695.67 × 178,997.54
  4. Step 4: Simplify right side
    306,346.55x = 75,661,482,090.19
  5. Step 5: Solve for x
    x = 75,661,482,090.19/306,346.55
  6. Step 6: Final answer
    x = 246,980.04

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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.