Home / 393,156,986.80-589,735,480.20-385,504,236.40

Finding the Fourth Proportional to 393,156,986.80, 589,735,480.20 and 385,504,236.40

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Solution

The fourth proportional to 393,156,986.80, 589,735,480.20 and 385,504,236.40 is: 578,256,354.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,156,986.80 : 589,735,480.20 = 385,504,236.40 : x
  2. Step 2: Convert to fraction form
    393,156,986.80/589,735,480.20 = 385,504,236.40/x
  3. Step 3: Cross multiply
    393,156,986.80x = 589,735,480.20 × 385,504,236.40
  4. Step 4: Simplify right side
    393,156,986.80x = 227,345,525,972,488,320
  5. Step 5: Solve for x
    x = 227,345,525,972,488,320/393,156,986.80
  6. Step 6: Final answer
    x = 578,256,354.60

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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.