Home / 420,300-580,014-269,397.36

Finding the Fourth Proportional to 420,300, 580,014 and 269,397.36

Calculator

Solution

The fourth proportional to 420,300, 580,014 and 269,397.36 is: 371,768.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,300 : 580,014 = 269,397.36 : x
  2. Step 2: Convert to fraction form
    420,300/580,014 = 269,397.36/x
  3. Step 3: Cross multiply
    420,300x = 580,014 × 269,397.36
  4. Step 4: Simplify right side
    420,300x = 156,254,240,363.04
  5. Step 5: Solve for x
    x = 156,254,240,363.04/420,300
  6. Step 6: Final answer
    x = 371,768.36

Related Problems

Find fourth proportional to 210,150, 290,007 and 134,698.68
Half scale
Find fourth proportional to 840,600, 1,160,028 and 538,794.72
Double scale
Find fourth proportional to 420,301, 580,015.38 and 269,398.36
Similar ratio
Find fourth proportional to 630,450, 870,021 and 404,096.04
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.