Home / 571.80-858-312

Finding the Fourth Proportional to 571.80, 858 and 312

Calculator

Solution

The fourth proportional to 571.80, 858 and 312 is: 468.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.80 : 858 = 312 : x
  2. Step 2: Convert to fraction form
    571.80/858 = 312/x
  3. Step 3: Cross multiply
    571.80x = 858 × 312
  4. Step 4: Simplify right side
    571.80x = 267,696
  5. Step 5: Solve for x
    x = 267,696/571.80
  6. Step 6: Final answer
    x = 468.16

Related Problems

Find fourth proportional to 285.90, 429 and 156
Half scale
Find fourth proportional to 1,143.60, 1,716 and 624
Double scale
Find fourth proportional to 572.80, 859.50 and 313
Similar ratio
Find fourth proportional to 857.70, 1,287 and 468
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.