Home / 1,445.18-1,994-855.78

Finding the Fourth Proportional to 1,445.18, 1,994 and 855.78

Calculator

Solution

The fourth proportional to 1,445.18, 1,994 and 855.78 is: 1,180.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,445.18 : 1,994 = 855.78 : x
  2. Step 2: Convert to fraction form
    1,445.18/1,994 = 855.78/x
  3. Step 3: Cross multiply
    1,445.18x = 1,994 × 855.78
  4. Step 4: Simplify right side
    1,445.18x = 1,706,425.32
  5. Step 5: Solve for x
    x = 1,706,425.32/1,445.18
  6. Step 6: Final answer
    x = 1,180.77

Related Problems

Find fourth proportional to 722.59, 997 and 427.89
Half scale
Find fourth proportional to 2,890.36, 3,988 and 1,711.56
Double scale
Find fourth proportional to 1,446.18, 1,995.38 and 856.78
Similar ratio
Find fourth proportional to 2,167.77, 2,991 and 1,283.67
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.