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Finding the Fourth Proportional to 554,138.88, 764,665.56 and 312,481.06

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Solution

The fourth proportional to 554,138.88, 764,665.56 and 312,481.06 is: 431,197.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,138.88 : 764,665.56 = 312,481.06 : x
  2. Step 2: Convert to fraction form
    554,138.88/764,665.56 = 312,481.06/x
  3. Step 3: Cross multiply
    554,138.88x = 764,665.56 × 312,481.06
  4. Step 4: Simplify right side
    554,138.88x = 238,943,504,734.29
  5. Step 5: Solve for x
    x = 238,943,504,734.29/554,138.88
  6. Step 6: Final answer
    x = 431,197.87

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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.