Home / 1,386.88-1,914-765.92

Finding the Fourth Proportional to 1,386.88, 1,914 and 765.92

Calculator

Solution

The fourth proportional to 1,386.88, 1,914 and 765.92 is: 1,057.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.88 : 1,914 = 765.92 : x
  2. Step 2: Convert to fraction form
    1,386.88/1,914 = 765.92/x
  3. Step 3: Cross multiply
    1,386.88x = 1,914 × 765.92
  4. Step 4: Simplify right side
    1,386.88x = 1,465,970.88
  5. Step 5: Solve for x
    x = 1,465,970.88/1,386.88
  6. Step 6: Final answer
    x = 1,057.03

Related Problems

Find fourth proportional to 693.44, 957 and 382.96
Half scale
Find fourth proportional to 2,773.76, 3,828 and 1,531.84
Double scale
Find fourth proportional to 1,387.88, 1,915.38 and 766.92
Similar ratio
Find fourth proportional to 2,080.32, 2,871 and 1,148.88
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.