Home / 1,907.74-2,862-812.10

Finding the Fourth Proportional to 1,907.74, 2,862 and 812.10

Calculator

Solution

The fourth proportional to 1,907.74, 2,862 and 812.10 is: 1,218.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,907.74 : 2,862 = 812.10 : x
  2. Step 2: Convert to fraction form
    1,907.74/2,862 = 812.10/x
  3. Step 3: Cross multiply
    1,907.74x = 2,862 × 812.10
  4. Step 4: Simplify right side
    1,907.74x = 2,324,230.20
  5. Step 5: Solve for x
    x = 2,324,230.20/1,907.74
  6. Step 6: Final answer
    x = 1,218.32

Related Problems

Find fourth proportional to 953.87, 1,431 and 406.05
Half scale
Find fourth proportional to 3,815.48, 5,724 and 1,624.20
Double scale
Find fourth proportional to 1,908.74, 2,863.50 and 813.10
Similar ratio
Find fourth proportional to 2,861.61, 4,293 and 1,218.15
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.