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Finding the Fourth Proportional to 1,836, 2,535.78 and 1,245.54

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Solution

The fourth proportional to 1,836, 2,535.78 and 1,245.54 is: 1,720.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,836 : 2,535.78 = 1,245.54 : x
  2. Step 2: Convert to fraction form
    1,836/2,535.78 = 1,245.54/x
  3. Step 3: Cross multiply
    1,836x = 2,535.78 × 1,245.54
  4. Step 4: Simplify right side
    1,836x = 3,158,415.42
  5. Step 5: Solve for x
    x = 3,158,415.42/1,836
  6. Step 6: Final answer
    x = 1,720.27

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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.