Home / 3,640-5,460-904

Finding the Fourth Proportional to 3,640, 5,460 and 904

Calculator

Solution

The fourth proportional to 3,640, 5,460 and 904 is: 1,356

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,640 : 5,460 = 904 : x
  2. Step 2: Convert to fraction form
    3,640/5,460 = 904/x
  3. Step 3: Cross multiply
    3,640x = 5,460 × 904
  4. Step 4: Simplify right side
    3,640x = 4,935,840
  5. Step 5: Solve for x
    x = 4,935,840/3,640
  6. Step 6: Final answer
    x = 1,356

Related Problems

Find fourth proportional to 1,820, 2,730 and 452
Half scale
Find fourth proportional to 7,280, 10,920 and 1,808
Double scale
Find fourth proportional to 3,641, 5,461.50 and 905
Similar ratio
Find fourth proportional to 5,460, 8,190 and 1,356
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.