Home / 1,778.40-2,665.20-1,264.80

Finding the Fourth Proportional to 1,778.40, 2,665.20 and 1,264.80

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Solution

The fourth proportional to 1,778.40, 2,665.20 and 1,264.80 is: 1,895.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.40 : 2,665.20 = 1,264.80 : x
  2. Step 2: Convert to fraction form
    1,778.40/2,665.20 = 1,264.80/x
  3. Step 3: Cross multiply
    1,778.40x = 2,665.20 × 1,264.80
  4. Step 4: Simplify right side
    1,778.40x = 3,370,944.96
  5. Step 5: Solve for x
    x = 3,370,944.96/1,778.40
  6. Step 6: Final answer
    x = 1,895.49

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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.