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Finding the Fourth Proportional to 438,449.42, 605,161.32 and 257,219.58

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Solution

The fourth proportional to 438,449.42, 605,161.32 and 257,219.58 is: 355,022.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,449.42 : 605,161.32 = 257,219.58 : x
  2. Step 2: Convert to fraction form
    438,449.42/605,161.32 = 257,219.58/x
  3. Step 3: Cross multiply
    438,449.42x = 605,161.32 × 257,219.58
  4. Step 4: Simplify right side
    438,449.42x = 155,659,340,562.65
  5. Step 5: Solve for x
    x = 155,659,340,562.65/438,449.42
  6. Step 6: Final answer
    x = 355,022.34

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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.