Home / 809,414.40-1,214,121.60-389,510.40

Finding the Fourth Proportional to 809,414.40, 1,214,121.60 and 389,510.40

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Solution

The fourth proportional to 809,414.40, 1,214,121.60 and 389,510.40 is: 584,265.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,414.40 : 1,214,121.60 = 389,510.40 : x
  2. Step 2: Convert to fraction form
    809,414.40/1,214,121.60 = 389,510.40/x
  3. Step 3: Cross multiply
    809,414.40x = 1,214,121.60 × 389,510.40
  4. Step 4: Simplify right side
    809,414.40x = 472,912,990,064.64
  5. Step 5: Solve for x
    x = 472,912,990,064.64/809,414.40
  6. Step 6: Final answer
    x = 584,265.60

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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.