Home / 1,778.63-2,669.99-1,389.06

Finding the Fourth Proportional to 1,778.63, 2,669.99 and 1,389.06

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Solution

The fourth proportional to 1,778.63, 2,669.99 and 1,389.06 is: 2,085.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.63 : 2,669.99 = 1,389.06 : x
  2. Step 2: Convert to fraction form
    1,778.63/2,669.99 = 1,389.06/x
  3. Step 3: Cross multiply
    1,778.63x = 2,669.99 × 1,389.06
  4. Step 4: Simplify right side
    1,778.63x = 3,708,769.36
  5. Step 5: Solve for x
    x = 3,708,769.36/1,778.63
  6. Step 6: Final answer
    x = 2,085.19

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1.5x scale

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.