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Finding the Fourth Proportional to 393,985,384.40, 590,978,076.60 and 372,822,222.80

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Solution

The fourth proportional to 393,985,384.40, 590,978,076.60 and 372,822,222.80 is: 559,233,334.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,985,384.40 : 590,978,076.60 = 372,822,222.80 : x
  2. Step 2: Convert to fraction form
    393,985,384.40/590,978,076.60 = 372,822,222.80/x
  3. Step 3: Cross multiply
    393,985,384.40x = 590,978,076.60 × 372,822,222.80
  4. Step 4: Simplify right side
    393,985,384.40x = 220,329,760,144,080,672
  5. Step 5: Solve for x
    x = 220,329,760,144,080,672/393,985,384.40
  6. Step 6: Final answer
    x = 559,233,334.20

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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.