Home / 1,411.19-2,114.50-861.70

Finding the Fourth Proportional to 1,411.19, 2,114.50 and 861.70

Calculator

Solution

The fourth proportional to 1,411.19, 2,114.50 and 861.70 is: 1,291.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,411.19 : 2,114.50 = 861.70 : x
  2. Step 2: Convert to fraction form
    1,411.19/2,114.50 = 861.70/x
  3. Step 3: Cross multiply
    1,411.19x = 2,114.50 × 861.70
  4. Step 4: Simplify right side
    1,411.19x = 1,822,064.65
  5. Step 5: Solve for x
    x = 1,822,064.65/1,411.19
  6. Step 6: Final answer
    x = 1,291.15

Related Problems

Find fourth proportional to 705.60, 1,057.25 and 430.85
Half scale
Find fourth proportional to 2,822.38, 4,229 and 1,723.40
Double scale
Find fourth proportional to 1,412.19, 2,116 and 862.70
Similar ratio
Find fourth proportional to 2,116.79, 3,171.75 and 1,292.55
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.