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Finding the Fourth Proportional to 1,644, 2,467.20 and 618

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Solution

The fourth proportional to 1,644, 2,467.20 and 618 is: 927.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,644 : 2,467.20 = 618 : x
  2. Step 2: Convert to fraction form
    1,644/2,467.20 = 618/x
  3. Step 3: Cross multiply
    1,644x = 2,467.20 × 618
  4. Step 4: Simplify right side
    1,644x = 1,524,729.60
  5. Step 5: Solve for x
    x = 1,524,729.60/1,644
  6. Step 6: Final answer
    x = 927.45

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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.