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Finding the Fourth Proportional to 306,018.90, 422,236.89 and 185,157.18

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Solution

The fourth proportional to 306,018.90, 422,236.89 and 185,157.18 is: 255,475.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,018.90 : 422,236.89 = 185,157.18 : x
  2. Step 2: Convert to fraction form
    306,018.90/422,236.89 = 185,157.18/x
  3. Step 3: Cross multiply
    306,018.90x = 422,236.89 × 185,157.18
  4. Step 4: Simplify right side
    306,018.90x = 78,180,191,844.37
  5. Step 5: Solve for x
    x = 78,180,191,844.37/306,018.90
  6. Step 6: Final answer
    x = 255,475.04

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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.