Home / 1,860.21-2,790.78-1,313.46

Finding the Fourth Proportional to 1,860.21, 2,790.78 and 1,313.46

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Solution

The fourth proportional to 1,860.21, 2,790.78 and 1,313.46 is: 1,970.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,860.21 : 2,790.78 = 1,313.46 : x
  2. Step 2: Convert to fraction form
    1,860.21/2,790.78 = 1,313.46/x
  3. Step 3: Cross multiply
    1,860.21x = 2,790.78 × 1,313.46
  4. Step 4: Simplify right side
    1,860.21x = 3,665,577.90
  5. Step 5: Solve for x
    x = 3,665,577.90/1,860.21
  6. Step 6: Final answer
    x = 1,970.52

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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.