Home / 1,340.48-2,011.20-656

Finding the Fourth Proportional to 1,340.48, 2,011.20 and 656

Calculator

Solution

The fourth proportional to 1,340.48, 2,011.20 and 656 is: 984.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.48 : 2,011.20 = 656 : x
  2. Step 2: Convert to fraction form
    1,340.48/2,011.20 = 656/x
  3. Step 3: Cross multiply
    1,340.48x = 2,011.20 × 656
  4. Step 4: Simplify right side
    1,340.48x = 1,319,347.20
  5. Step 5: Solve for x
    x = 1,319,347.20/1,340.48
  6. Step 6: Final answer
    x = 984.23

Related Problems

Find fourth proportional to 670.24, 1,005.60 and 328
Half scale
Find fourth proportional to 2,680.96, 4,022.40 and 1,312
Double scale
Find fourth proportional to 1,341.48, 2,012.70 and 657
Similar ratio
Find fourth proportional to 2,010.72, 3,016.80 and 984
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.