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Finding the Fourth Proportional to 389,218.56, 582,690.56 and 351,864.96

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Solution

The fourth proportional to 389,218.56, 582,690.56 and 351,864.96 is: 526,769.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,218.56 : 582,690.56 = 351,864.96 : x
  2. Step 2: Convert to fraction form
    389,218.56/582,690.56 = 351,864.96/x
  3. Step 3: Cross multiply
    389,218.56x = 582,690.56 × 351,864.96
  4. Step 4: Simplify right side
    389,218.56x = 205,028,390,586.78
  5. Step 5: Solve for x
    x = 205,028,390,586.78/389,218.56
  6. Step 6: Final answer
    x = 526,769.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.