Home / 802.88-1,204.32-392

Finding the Fourth Proportional to 802.88, 1,204.32 and 392

Calculator

Solution

The fourth proportional to 802.88, 1,204.32 and 392 is: 588

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.88 : 1,204.32 = 392 : x
  2. Step 2: Convert to fraction form
    802.88/1,204.32 = 392/x
  3. Step 3: Cross multiply
    802.88x = 1,204.32 × 392
  4. Step 4: Simplify right side
    802.88x = 472,093.44
  5. Step 5: Solve for x
    x = 472,093.44/802.88
  6. Step 6: Final answer
    x = 588

Related Problems

Find fourth proportional to 401.44, 602.16 and 196
Half scale
Find fourth proportional to 1,605.76, 2,408.64 and 784
Double scale
Find fourth proportional to 803.88, 1,205.82 and 393
Similar ratio
Find fourth proportional to 1,204.32, 1,806.48 and 588
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.