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Finding the Fourth Proportional to 389,124, 582,930.72 and 255,599.10

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Solution

The fourth proportional to 389,124, 582,930.72 and 255,599.10 is: 382,902.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,124 : 582,930.72 = 255,599.10 : x
  2. Step 2: Convert to fraction form
    389,124/582,930.72 = 255,599.10/x
  3. Step 3: Cross multiply
    389,124x = 582,930.72 × 255,599.10
  4. Step 4: Simplify right side
    389,124x = 148,996,567,394.35
  5. Step 5: Solve for x
    x = 148,996,567,394.35/389,124
  6. Step 6: Final answer
    x = 382,902.54

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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.