Home / 326-489-307.40

Finding the Fourth Proportional to 326, 489 and 307.40

Calculator

Solution

The fourth proportional to 326, 489 and 307.40 is: 461.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    326 : 489 = 307.40 : x
  2. Step 2: Convert to fraction form
    326/489 = 307.40/x
  3. Step 3: Cross multiply
    326x = 489 × 307.40
  4. Step 4: Simplify right side
    326x = 150,318.60
  5. Step 5: Solve for x
    x = 150,318.60/326
  6. Step 6: Final answer
    x = 461.10

Related Problems

Find fourth proportional to 163, 244.50 and 153.70
Half scale
Find fourth proportional to 652, 978 and 614.80
Double scale
Find fourth proportional to 327, 490.50 and 308.40
Similar ratio
Find fourth proportional to 489, 733.50 and 461.10
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.