Home / 539,784-809,676-145,800

Finding the Fourth Proportional to 539,784, 809,676 and 145,800

Calculator

Solution

The fourth proportional to 539,784, 809,676 and 145,800 is: 218,700

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,784 : 809,676 = 145,800 : x
  2. Step 2: Convert to fraction form
    539,784/809,676 = 145,800/x
  3. Step 3: Cross multiply
    539,784x = 809,676 × 145,800
  4. Step 4: Simplify right side
    539,784x = 118,050,760,800
  5. Step 5: Solve for x
    x = 118,050,760,800/539,784
  6. Step 6: Final answer
    x = 218,700

Related Problems

Find fourth proportional to 269,892, 404,838 and 72,900
Half scale
Find fourth proportional to 1,079,568, 1,619,352 and 291,600
Double scale
Find fourth proportional to 539,785, 809,677.50 and 145,801
Similar ratio
Find fourth proportional to 809,676, 1,214,514 and 218,700
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.