Home / 434,629.80-653,694.30-389,140.20

Finding the Fourth Proportional to 434,629.80, 653,694.30 and 389,140.20

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Solution

The fourth proportional to 434,629.80, 653,694.30 and 389,140.20 is: 585,276.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    434,629.80 : 653,694.30 = 389,140.20 : x
  2. Step 2: Convert to fraction form
    434,629.80/653,694.30 = 389,140.20/x
  3. Step 3: Cross multiply
    434,629.80x = 653,694.30 × 389,140.20
  4. Step 4: Simplify right side
    434,629.80x = 254,378,730,640.86
  5. Step 5: Solve for x
    x = 254,378,730,640.86/434,629.80
  6. Step 6: Final answer
    x = 585,276.78

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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.