Home / 2,280-3,420-1,064

Finding the Fourth Proportional to 2,280, 3,420 and 1,064

Calculator

Solution

The fourth proportional to 2,280, 3,420 and 1,064 is: 1,596

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,280 : 3,420 = 1,064 : x
  2. Step 2: Convert to fraction form
    2,280/3,420 = 1,064/x
  3. Step 3: Cross multiply
    2,280x = 3,420 × 1,064
  4. Step 4: Simplify right side
    2,280x = 3,638,880
  5. Step 5: Solve for x
    x = 3,638,880/2,280
  6. Step 6: Final answer
    x = 1,596

Related Problems

Find fourth proportional to 1,140, 1,710 and 532
Half scale
Find fourth proportional to 4,560, 6,840 and 2,128
Double scale
Find fourth proportional to 2,281, 3,421.50 and 1,065
Similar ratio
Find fourth proportional to 3,420, 5,130 and 1,596
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.