Home / 1,079.40-1,617.72-501

Finding the Fourth Proportional to 1,079.40, 1,617.72 and 501

Calculator

Solution

The fourth proportional to 1,079.40, 1,617.72 and 501 is: 750.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.40 : 1,617.72 = 501 : x
  2. Step 2: Convert to fraction form
    1,079.40/1,617.72 = 501/x
  3. Step 3: Cross multiply
    1,079.40x = 1,617.72 × 501
  4. Step 4: Simplify right side
    1,079.40x = 810,477.72
  5. Step 5: Solve for x
    x = 810,477.72/1,079.40
  6. Step 6: Final answer
    x = 750.86

Related Problems

Find fourth proportional to 539.70, 808.86 and 250.50
Half scale
Find fourth proportional to 2,158.80, 3,235.44 and 1,002
Double scale
Find fourth proportional to 1,080.40, 1,619.22 and 502
Similar ratio
Find fourth proportional to 1,619.10, 2,426.58 and 751.50
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.