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Finding the Fourth Proportional to 306,388.06, 422,809.40 and 170,419.07

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Solution

The fourth proportional to 306,388.06, 422,809.40 and 170,419.07 is: 235,174.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,388.06 : 422,809.40 = 170,419.07 : x
  2. Step 2: Convert to fraction form
    306,388.06/422,809.40 = 170,419.07/x
  3. Step 3: Cross multiply
    306,388.06x = 422,809.40 × 170,419.07
  4. Step 4: Simplify right side
    306,388.06x = 72,054,786,218.33
  5. Step 5: Solve for x
    x = 72,054,786,218.33/306,388.06
  6. Step 6: Final answer
    x = 235,174.92

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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.