Home / 398,654,839.80-597,982,259.70-315,431,179.20

Finding the Fourth Proportional to 398,654,839.80, 597,982,259.70 and 315,431,179.20

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Solution

The fourth proportional to 398,654,839.80, 597,982,259.70 and 315,431,179.20 is: 473,146,768.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,654,839.80 : 597,982,259.70 = 315,431,179.20 : x
  2. Step 2: Convert to fraction form
    398,654,839.80/597,982,259.70 = 315,431,179.20/x
  3. Step 3: Cross multiply
    398,654,839.80x = 597,982,259.70 × 315,431,179.20
  4. Step 4: Simplify right side
    398,654,839.80x = 188,622,249,317,851,648
  5. Step 5: Solve for x
    x = 188,622,249,317,851,648/398,654,839.80
  6. Step 6: Final answer
    x = 473,146,768.80

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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.