Home / 1,861.90-2,790.68-1,370.40

Finding the Fourth Proportional to 1,861.90, 2,790.68 and 1,370.40

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Solution

The fourth proportional to 1,861.90, 2,790.68 and 1,370.40 is: 2,054.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.90 : 2,790.68 = 1,370.40 : x
  2. Step 2: Convert to fraction form
    1,861.90/2,790.68 = 1,370.40/x
  3. Step 3: Cross multiply
    1,861.90x = 2,790.68 × 1,370.40
  4. Step 4: Simplify right side
    1,861.90x = 3,824,347.87
  5. Step 5: Solve for x
    x = 3,824,347.87/1,861.90
  6. Step 6: Final answer
    x = 2,054.00

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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.