Home / 393,156,970.80-589,735,456.20-385,504,220.40

Finding the Fourth Proportional to 393,156,970.80, 589,735,456.20 and 385,504,220.40

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Solution

The fourth proportional to 393,156,970.80, 589,735,456.20 and 385,504,220.40 is: 578,256,330.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,156,970.80 : 589,735,456.20 = 385,504,220.40 : x
  2. Step 2: Convert to fraction form
    393,156,970.80/589,735,456.20 = 385,504,220.40/x
  3. Step 3: Cross multiply
    393,156,970.80x = 589,735,456.20 × 385,504,220.40
  4. Step 4: Simplify right side
    393,156,970.80x = 227,345,507,284,619,360
  5. Step 5: Solve for x
    x = 227,345,507,284,619,360/393,156,970.80
  6. Step 6: Final answer
    x = 578,256,330.60

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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.