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Finding the Fourth Proportional to 398,231.54, 549,022.20 and 385,848.26

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Solution

The fourth proportional to 398,231.54, 549,022.20 and 385,848.26 is: 531,949.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,231.54 : 549,022.20 = 385,848.26 : x
  2. Step 2: Convert to fraction form
    398,231.54/549,022.20 = 385,848.26/x
  3. Step 3: Cross multiply
    398,231.54x = 549,022.20 × 385,848.26
  4. Step 4: Simplify right side
    398,231.54x = 211,839,260,608.56
  5. Step 5: Solve for x
    x = 211,839,260,608.56/398,231.54
  6. Step 6: Final answer
    x = 531,949.98

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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.