Home / 393,663,999.20-590,495,998.80-209,997,989.60

Finding the Fourth Proportional to 393,663,999.20, 590,495,998.80 and 209,997,989.60

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Solution

The fourth proportional to 393,663,999.20, 590,495,998.80 and 209,997,989.60 is: 314,996,984.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,663,999.20 : 590,495,998.80 = 209,997,989.60 : x
  2. Step 2: Convert to fraction form
    393,663,999.20/590,495,998.80 = 209,997,989.60/x
  3. Step 3: Cross multiply
    393,663,999.20x = 590,495,998.80 × 209,997,989.60
  4. Step 4: Simplify right side
    393,663,999.20x = 124,002,972,614,844,000
  5. Step 5: Solve for x
    x = 124,002,972,614,844,000/393,663,999.20
  6. Step 6: Final answer
    x = 314,996,984.40

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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.