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Finding the Fourth Proportional to 620,659.11, 856,456.56 and 348,705.66

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Solution

The fourth proportional to 620,659.11, 856,456.56 and 348,705.66 is: 481,184.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,659.11 : 856,456.56 = 348,705.66 : x
  2. Step 2: Convert to fraction form
    620,659.11/856,456.56 = 348,705.66/x
  3. Step 3: Cross multiply
    620,659.11x = 856,456.56 × 348,705.66
  4. Step 4: Simplify right side
    620,659.11x = 298,651,250,016.13
  5. Step 5: Solve for x
    x = 298,651,250,016.13/620,659.11
  6. Step 6: Final answer
    x = 481,184.03

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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.