Home / 256,922.28-385,441.92-138,591

Finding the Fourth Proportional to 256,922.28, 385,441.92 and 138,591

Calculator

Solution

The fourth proportional to 256,922.28, 385,441.92 and 138,591 is: 207,918.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,922.28 : 385,441.92 = 138,591 : x
  2. Step 2: Convert to fraction form
    256,922.28/385,441.92 = 138,591/x
  3. Step 3: Cross multiply
    256,922.28x = 385,441.92 × 138,591
  4. Step 4: Simplify right side
    256,922.28x = 53,418,781,134.72
  5. Step 5: Solve for x
    x = 53,418,781,134.72/256,922.28
  6. Step 6: Final answer
    x = 207,918.06

Related Problems

Find fourth proportional to 128,461.14, 192,720.96 and 69,295.50
Half scale
Find fourth proportional to 513,844.56, 770,883.84 and 277,182
Double scale
Find fourth proportional to 256,923.28, 385,443.42 and 138,592
Similar ratio
Find fourth proportional to 385,383.42, 578,162.88 and 207,886.50
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.