Home / 1,681.48-2,522-641.04

Finding the Fourth Proportional to 1,681.48, 2,522 and 641.04

Calculator

Solution

The fourth proportional to 1,681.48, 2,522 and 641.04 is: 961.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.48 : 2,522 = 641.04 : x
  2. Step 2: Convert to fraction form
    1,681.48/2,522 = 641.04/x
  3. Step 3: Cross multiply
    1,681.48x = 2,522 × 641.04
  4. Step 4: Simplify right side
    1,681.48x = 1,616,702.88
  5. Step 5: Solve for x
    x = 1,616,702.88/1,681.48
  6. Step 6: Final answer
    x = 961.48

Related Problems

Find fourth proportional to 840.74, 1,261 and 320.52
Half scale
Find fourth proportional to 3,362.96, 5,044 and 1,282.08
Double scale
Find fourth proportional to 1,682.48, 2,523.50 and 642.04
Similar ratio
Find fourth proportional to 2,522.22, 3,783 and 961.56
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.