Home / 390,640.32-585,960.48-141,264

Finding the Fourth Proportional to 390,640.32, 585,960.48 and 141,264

Calculator

Solution

The fourth proportional to 390,640.32, 585,960.48 and 141,264 is: 211,896

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,640.32 : 585,960.48 = 141,264 : x
  2. Step 2: Convert to fraction form
    390,640.32/585,960.48 = 141,264/x
  3. Step 3: Cross multiply
    390,640.32x = 585,960.48 × 141,264
  4. Step 4: Simplify right side
    390,640.32x = 82,775,121,246.72
  5. Step 5: Solve for x
    x = 82,775,121,246.72/390,640.32
  6. Step 6: Final answer
    x = 211,896

Related Problems

Find fourth proportional to 195,320.16, 292,980.24 and 70,632
Half scale
Find fourth proportional to 781,280.64, 1,171,920.96 and 282,528
Double scale
Find fourth proportional to 390,641.32, 585,961.98 and 141,265
Similar ratio
Find fourth proportional to 585,960.48, 878,940.72 and 211,896
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.