Home / 588.40-811.43-389.14

Finding the Fourth Proportional to 588.40, 811.43 and 389.14

Calculator

Solution

The fourth proportional to 588.40, 811.43 and 389.14 is: 536.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    588.40 : 811.43 = 389.14 : x
  2. Step 2: Convert to fraction form
    588.40/811.43 = 389.14/x
  3. Step 3: Cross multiply
    588.40x = 811.43 × 389.14
  4. Step 4: Simplify right side
    588.40x = 315,760.40
  5. Step 5: Solve for x
    x = 315,760.40/588.40
  6. Step 6: Final answer
    x = 536.64

Related Problems

Find fourth proportional to 294.20, 405.71 and 194.57
Half scale
Find fourth proportional to 1,176.80, 1,622.86 and 778.28
Double scale
Find fourth proportional to 589.40, 812.81 and 390.14
Similar ratio
Find fourth proportional to 882.60, 1,217.14 and 583.71
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.