Home / 282.96-390-213

Finding the Fourth Proportional to 282.96, 390 and 213

Calculator

Solution

The fourth proportional to 282.96, 390 and 213 is: 293.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.96 : 390 = 213 : x
  2. Step 2: Convert to fraction form
    282.96/390 = 213/x
  3. Step 3: Cross multiply
    282.96x = 390 × 213
  4. Step 4: Simplify right side
    282.96x = 83,070
  5. Step 5: Solve for x
    x = 83,070/282.96
  6. Step 6: Final answer
    x = 293.58

Related Problems

Find fourth proportional to 141.48, 195 and 106.50
Half scale
Find fourth proportional to 565.92, 780 and 426
Double scale
Find fourth proportional to 283.96, 391.38 and 214
Similar ratio
Find fourth proportional to 424.44, 585 and 319.50
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.