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Finding the Fourth Proportional to 306,394.72, 422,824.69 and 172,258.72

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Solution

The fourth proportional to 306,394.72, 422,824.69 and 172,258.72 is: 237,717.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,394.72 : 422,824.69 = 172,258.72 : x
  2. Step 2: Convert to fraction form
    306,394.72/422,824.69 = 172,258.72/x
  3. Step 3: Cross multiply
    306,394.72x = 422,824.69 × 172,258.72
  4. Step 4: Simplify right side
    306,394.72x = 72,835,239,883.80
  5. Step 5: Solve for x
    x = 72,835,239,883.80/306,394.72
  6. Step 6: Final answer
    x = 237,717.02

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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.