Home / 372.30-514.28-286.05

Finding the Fourth Proportional to 372.30, 514.28 and 286.05

Calculator

Solution

The fourth proportional to 372.30, 514.28 and 286.05 is: 395.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.30 : 514.28 = 286.05 : x
  2. Step 2: Convert to fraction form
    372.30/514.28 = 286.05/x
  3. Step 3: Cross multiply
    372.30x = 514.28 × 286.05
  4. Step 4: Simplify right side
    372.30x = 147,108.36
  5. Step 5: Solve for x
    x = 147,108.36/372.30
  6. Step 6: Final answer
    x = 395.13

Related Problems

Find fourth proportional to 186.15, 257.14 and 143.03
Half scale
Find fourth proportional to 744.60, 1,028.55 and 572.10
Double scale
Find fourth proportional to 373.30, 515.66 and 287.05
Similar ratio
Find fourth proportional to 558.45, 771.41 and 429.08
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.