Home / 1,078.40-1,615.92-462

Finding the Fourth Proportional to 1,078.40, 1,615.92 and 462

Calculator

Solution

The fourth proportional to 1,078.40, 1,615.92 and 462 is: 692.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078.40 : 1,615.92 = 462 : x
  2. Step 2: Convert to fraction form
    1,078.40/1,615.92 = 462/x
  3. Step 3: Cross multiply
    1,078.40x = 1,615.92 × 462
  4. Step 4: Simplify right side
    1,078.40x = 746,555.04
  5. Step 5: Solve for x
    x = 746,555.04/1,078.40
  6. Step 6: Final answer
    x = 692.28

Related Problems

Find fourth proportional to 539.20, 807.96 and 231
Half scale
Find fourth proportional to 2,156.80, 3,231.84 and 924
Double scale
Find fourth proportional to 1,079.40, 1,617.42 and 463
Similar ratio
Find fourth proportional to 1,617.60, 2,423.88 and 693
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.