Home / 1,521.60-2,282.52-426

Finding the Fourth Proportional to 1,521.60, 2,282.52 and 426

Calculator

Solution

The fourth proportional to 1,521.60, 2,282.52 and 426 is: 639.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.60 : 2,282.52 = 426 : x
  2. Step 2: Convert to fraction form
    1,521.60/2,282.52 = 426/x
  3. Step 3: Cross multiply
    1,521.60x = 2,282.52 × 426
  4. Step 4: Simplify right side
    1,521.60x = 972,353.52
  5. Step 5: Solve for x
    x = 972,353.52/1,521.60
  6. Step 6: Final answer
    x = 639.03

Related Problems

Find fourth proportional to 760.80, 1,141.26 and 213
Half scale
Find fourth proportional to 3,043.20, 4,565.04 and 852
Double scale
Find fourth proportional to 1,522.60, 2,284.02 and 427
Similar ratio
Find fourth proportional to 2,282.40, 3,423.78 and 639
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.