Home / 1,208.31-1,812.62-559

Finding the Fourth Proportional to 1,208.31, 1,812.62 and 559

Calculator

Solution

The fourth proportional to 1,208.31, 1,812.62 and 559 is: 838.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208.31 : 1,812.62 = 559 : x
  2. Step 2: Convert to fraction form
    1,208.31/1,812.62 = 559/x
  3. Step 3: Cross multiply
    1,208.31x = 1,812.62 × 559
  4. Step 4: Simplify right side
    1,208.31x = 1,013,254.58
  5. Step 5: Solve for x
    x = 1,013,254.58/1,208.31
  6. Step 6: Final answer
    x = 838.57

Related Problems

Find fourth proportional to 604.16, 906.31 and 279.50
Half scale
Find fourth proportional to 2,416.62, 3,625.24 and 1,118
Double scale
Find fourth proportional to 1,209.31, 1,814.12 and 560
Similar ratio
Find fourth proportional to 1,812.47, 2,718.93 and 838.50
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.