Home / 948-1,422.64-340

Finding the Fourth Proportional to 948, 1,422.64 and 340

Calculator

Solution

The fourth proportional to 948, 1,422.64 and 340 is: 510.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    948 : 1,422.64 = 340 : x
  2. Step 2: Convert to fraction form
    948/1,422.64 = 340/x
  3. Step 3: Cross multiply
    948x = 1,422.64 × 340
  4. Step 4: Simplify right side
    948x = 483,697.60
  5. Step 5: Solve for x
    x = 483,697.60/948
  6. Step 6: Final answer
    x = 510.23

Related Problems

Find fourth proportional to 474, 711.32 and 170
Half scale
Find fourth proportional to 1,896, 2,845.28 and 680
Double scale
Find fourth proportional to 949, 1,424.14 and 341
Similar ratio
Find fourth proportional to 1,422, 2,133.96 and 510
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.