Home / 434.80-600-318.40

Finding the Fourth Proportional to 434.80, 600 and 318.40

Calculator

Solution

The fourth proportional to 434.80, 600 and 318.40 is: 439.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.80 : 600 = 318.40 : x
  2. Step 2: Convert to fraction form
    434.80/600 = 318.40/x
  3. Step 3: Cross multiply
    434.80x = 600 × 318.40
  4. Step 4: Simplify right side
    434.80x = 191,040
  5. Step 5: Solve for x
    x = 191,040/434.80
  6. Step 6: Final answer
    x = 439.37

Related Problems

Find fourth proportional to 217.40, 300 and 159.20
Half scale
Find fourth proportional to 869.60, 1,200 and 636.80
Double scale
Find fourth proportional to 435.80, 601.38 and 319.40
Similar ratio
Find fourth proportional to 652.20, 900 and 477.60
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.