Home / 562.20-843.30-457.80

Finding the Fourth Proportional to 562.20, 843.30 and 457.80

Calculator

Solution

The fourth proportional to 562.20, 843.30 and 457.80 is: 686.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    562.20 : 843.30 = 457.80 : x
  2. Step 2: Convert to fraction form
    562.20/843.30 = 457.80/x
  3. Step 3: Cross multiply
    562.20x = 843.30 × 457.80
  4. Step 4: Simplify right side
    562.20x = 386,062.74
  5. Step 5: Solve for x
    x = 386,062.74/562.20
  6. Step 6: Final answer
    x = 686.70

Related Problems

Find fourth proportional to 281.10, 421.65 and 228.90
Half scale
Find fourth proportional to 1,124.40, 1,686.60 and 915.60
Double scale
Find fourth proportional to 563.20, 844.80 and 458.80
Similar ratio
Find fourth proportional to 843.30, 1,264.95 and 686.70
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.