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Finding the Fourth Proportional to 306,215.82, 422,441.44 and 178,835.22

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Solution

The fourth proportional to 306,215.82, 422,441.44 and 178,835.22 is: 246,712.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,215.82 : 422,441.44 = 178,835.22 : x
  2. Step 2: Convert to fraction form
    306,215.82/422,441.44 = 178,835.22/x
  3. Step 3: Cross multiply
    306,215.82x = 422,441.44 × 178,835.22
  4. Step 4: Simplify right side
    306,215.82x = 75,547,407,412.43
  5. Step 5: Solve for x
    x = 75,547,407,412.43/306,215.82
  6. Step 6: Final answer
    x = 246,712.95

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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.