Home / 283-390.70-213.88

Finding the Fourth Proportional to 283, 390.70 and 213.88

Calculator

Solution

The fourth proportional to 283, 390.70 and 213.88 is: 295.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    283 : 390.70 = 213.88 : x
  2. Step 2: Convert to fraction form
    283/390.70 = 213.88/x
  3. Step 3: Cross multiply
    283x = 390.70 × 213.88
  4. Step 4: Simplify right side
    283x = 83,562.92
  5. Step 5: Solve for x
    x = 83,562.92/283
  6. Step 6: Final answer
    x = 295.28

Related Problems

Find fourth proportional to 141.50, 195.35 and 106.94
Half scale
Find fourth proportional to 566, 781.40 and 427.76
Double scale
Find fourth proportional to 284, 392.08 and 214.88
Similar ratio
Find fourth proportional to 424.50, 586.05 and 320.82
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.