Home / 259-357.38-171.78

Finding the Fourth Proportional to 259, 357.38 and 171.78

Calculator

Solution

The fourth proportional to 259, 357.38 and 171.78 is: 237.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    259 : 357.38 = 171.78 : x
  2. Step 2: Convert to fraction form
    259/357.38 = 171.78/x
  3. Step 3: Cross multiply
    259x = 357.38 × 171.78
  4. Step 4: Simplify right side
    259x = 61,390.74
  5. Step 5: Solve for x
    x = 61,390.74/259
  6. Step 6: Final answer
    x = 237.03

Related Problems

Find fourth proportional to 129.50, 178.69 and 85.89
Half scale
Find fourth proportional to 518, 714.76 and 343.56
Double scale
Find fourth proportional to 260, 358.76 and 172.78
Similar ratio
Find fourth proportional to 388.50, 536.07 and 257.67
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.