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Finding the Fourth Proportional to 1,618.74, 2,427.56 and 838.64

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Solution

The fourth proportional to 1,618.74, 2,427.56 and 838.64 is: 1,257.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,618.74 : 2,427.56 = 838.64 : x
  2. Step 2: Convert to fraction form
    1,618.74/2,427.56 = 838.64/x
  3. Step 3: Cross multiply
    1,618.74x = 2,427.56 × 838.64
  4. Step 4: Simplify right side
    1,618.74x = 2,035,848.92
  5. Step 5: Solve for x
    x = 2,035,848.92/1,618.74
  6. Step 6: Final answer
    x = 1,257.68

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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.