Home / 1,056.52-1,584.78-287

Finding the Fourth Proportional to 1,056.52, 1,584.78 and 287

Calculator

Solution

The fourth proportional to 1,056.52, 1,584.78 and 287 is: 430.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,056.52 : 1,584.78 = 287 : x
  2. Step 2: Convert to fraction form
    1,056.52/1,584.78 = 287/x
  3. Step 3: Cross multiply
    1,056.52x = 1,584.78 × 287
  4. Step 4: Simplify right side
    1,056.52x = 454,831.86
  5. Step 5: Solve for x
    x = 454,831.86/1,056.52
  6. Step 6: Final answer
    x = 430.50

Related Problems

Find fourth proportional to 528.26, 792.39 and 143.50
Half scale
Find fourth proportional to 2,113.04, 3,169.56 and 574
Double scale
Find fourth proportional to 1,057.52, 1,586.28 and 288
Similar ratio
Find fourth proportional to 1,584.78, 2,377.17 and 430.50
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.