Home / 515.88-711.90-283

Finding the Fourth Proportional to 515.88, 711.90 and 283

Calculator

Solution

The fourth proportional to 515.88, 711.90 and 283 is: 390.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.88 : 711.90 = 283 : x
  2. Step 2: Convert to fraction form
    515.88/711.90 = 283/x
  3. Step 3: Cross multiply
    515.88x = 711.90 × 283
  4. Step 4: Simplify right side
    515.88x = 201,467.70
  5. Step 5: Solve for x
    x = 201,467.70/515.88
  6. Step 6: Final answer
    x = 390.53

Related Problems

Find fourth proportional to 257.94, 355.95 and 141.50
Half scale
Find fourth proportional to 1,031.76, 1,423.80 and 566
Double scale
Find fourth proportional to 516.88, 713.28 and 284
Similar ratio
Find fourth proportional to 773.82, 1,067.85 and 424.50
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.