Home / 350.78-483.95-210.85

Finding the Fourth Proportional to 350.78, 483.95 and 210.85

Calculator

Solution

The fourth proportional to 350.78, 483.95 and 210.85 is: 290.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    350.78 : 483.95 = 210.85 : x
  2. Step 2: Convert to fraction form
    350.78/483.95 = 210.85/x
  3. Step 3: Cross multiply
    350.78x = 483.95 × 210.85
  4. Step 4: Simplify right side
    350.78x = 102,038.59
  5. Step 5: Solve for x
    x = 102,038.59/350.78
  6. Step 6: Final answer
    x = 290.89

Related Problems

Find fourth proportional to 175.39, 241.97 and 105.42
Half scale
Find fourth proportional to 701.57, 967.89 and 421.70
Double scale
Find fourth proportional to 351.78, 485.32 and 211.85
Similar ratio
Find fourth proportional to 526.17, 725.92 and 316.27
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.