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Finding the Fourth Proportional to 620,659.33, 856,486.02 and 348,738.68

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Solution

The fourth proportional to 620,659.33, 856,486.02 and 348,738.68 is: 481,245.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,659.33 : 856,486.02 = 348,738.68 : x
  2. Step 2: Convert to fraction form
    620,659.33/856,486.02 = 348,738.68/x
  3. Step 3: Cross multiply
    620,659.33x = 856,486.02 × 348,738.68
  4. Step 4: Simplify right side
    620,659.33x = 298,689,805,540.58
  5. Step 5: Solve for x
    x = 298,689,805,540.58/620,659.33
  6. Step 6: Final answer
    x = 481,245.98

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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.