Home / 1,856.90-2,779.88-1,372.12

Finding the Fourth Proportional to 1,856.90, 2,779.88 and 1,372.12

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Solution

The fourth proportional to 1,856.90, 2,779.88 and 1,372.12 is: 2,054.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,856.90 : 2,779.88 = 1,372.12 : x
  2. Step 2: Convert to fraction form
    1,856.90/2,779.88 = 1,372.12/x
  3. Step 3: Cross multiply
    1,856.90x = 2,779.88 × 1,372.12
  4. Step 4: Simplify right side
    1,856.90x = 3,814,328.95
  5. Step 5: Solve for x
    x = 3,814,328.95/1,856.90
  6. Step 6: Final answer
    x = 2,054.14

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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.