Home / 1,852.70-2,780.40-1,236.20

Finding the Fourth Proportional to 1,852.70, 2,780.40 and 1,236.20

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Solution

The fourth proportional to 1,852.70, 2,780.40 and 1,236.20 is: 1,855.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,852.70 : 2,780.40 = 1,236.20 : x
  2. Step 2: Convert to fraction form
    1,852.70/2,780.40 = 1,236.20/x
  3. Step 3: Cross multiply
    1,852.70x = 2,780.40 × 1,236.20
  4. Step 4: Simplify right side
    1,852.70x = 3,437,130.48
  5. Step 5: Solve for x
    x = 3,437,130.48/1,852.70
  6. Step 6: Final answer
    x = 1,855.20

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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.