Home / 1,653.78-2,475.81-1,218

Finding the Fourth Proportional to 1,653.78, 2,475.81 and 1,218

Calculator

Solution

The fourth proportional to 1,653.78, 2,475.81 and 1,218 is: 1,823.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,653.78 : 2,475.81 = 1,218 : x
  2. Step 2: Convert to fraction form
    1,653.78/2,475.81 = 1,218/x
  3. Step 3: Cross multiply
    1,653.78x = 2,475.81 × 1,218
  4. Step 4: Simplify right side
    1,653.78x = 3,015,536.58
  5. Step 5: Solve for x
    x = 3,015,536.58/1,653.78
  6. Step 6: Final answer
    x = 1,823.42

Related Problems

Find fourth proportional to 826.89, 1,237.91 and 609
Half scale
Find fourth proportional to 3,307.56, 4,951.62 and 2,436
Double scale
Find fourth proportional to 1,654.78, 2,477.31 and 1,219
Similar ratio
Find fourth proportional to 2,480.67, 3,713.72 and 1,827
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.