Home / 640,022.40-884,073.60-490,959.36

Finding the Fourth Proportional to 640,022.40, 884,073.60 and 490,959.36

Calculator

Solution

The fourth proportional to 640,022.40, 884,073.60 and 490,959.36 is: 678,170.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,022.40 : 884,073.60 = 490,959.36 : x
  2. Step 2: Convert to fraction form
    640,022.40/884,073.60 = 490,959.36/x
  3. Step 3: Cross multiply
    640,022.40x = 884,073.60 × 490,959.36
  4. Step 4: Simplify right side
    640,022.40x = 434,044,208,848.90
  5. Step 5: Solve for x
    x = 434,044,208,848.90/640,022.40
  6. Step 6: Final answer
    x = 678,170.34

Related Problems

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.