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Finding the Fourth Proportional to 1,977.84, 2,728.64 and 1,347.37

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Solution

The fourth proportional to 1,977.84, 2,728.64 and 1,347.37 is: 1,858.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.84 : 2,728.64 = 1,347.37 : x
  2. Step 2: Convert to fraction form
    1,977.84/2,728.64 = 1,347.37/x
  3. Step 3: Cross multiply
    1,977.84x = 2,728.64 × 1,347.37
  4. Step 4: Simplify right side
    1,977.84x = 3,676,487.68
  5. Step 5: Solve for x
    x = 3,676,487.68/1,977.84
  6. Step 6: Final answer
    x = 1,858.84

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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.