Home / 488.20-730.70-344.20

Finding the Fourth Proportional to 488.20, 730.70 and 344.20

Calculator

Solution

The fourth proportional to 488.20, 730.70 and 344.20 is: 515.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.20 : 730.70 = 344.20 : x
  2. Step 2: Convert to fraction form
    488.20/730.70 = 344.20/x
  3. Step 3: Cross multiply
    488.20x = 730.70 × 344.20
  4. Step 4: Simplify right side
    488.20x = 251,506.94
  5. Step 5: Solve for x
    x = 251,506.94/488.20
  6. Step 6: Final answer
    x = 515.17

Related Problems

Find fourth proportional to 244.10, 365.35 and 172.10
Half scale
Find fourth proportional to 976.40, 1,461.40 and 688.40
Double scale
Find fourth proportional to 489.20, 732.20 and 345.20
Similar ratio
Find fourth proportional to 732.30, 1,096.05 and 516.30
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.