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Finding the Fourth Proportional to 393,985,615.40, 590,978,423.10 and 264,991,106.60

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Solution

The fourth proportional to 393,985,615.40, 590,978,423.10 and 264,991,106.60 is: 397,486,659.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,985,615.40 : 590,978,423.10 = 264,991,106.60 : x
  2. Step 2: Convert to fraction form
    393,985,615.40/590,978,423.10 = 264,991,106.60/x
  3. Step 3: Cross multiply
    393,985,615.40x = 590,978,423.10 × 264,991,106.60
  4. Step 4: Simplify right side
    393,985,615.40x = 156,604,026,313,992,000
  5. Step 5: Solve for x
    x = 156,604,026,313,992,000/393,985,615.40
  6. Step 6: Final answer
    x = 397,486,659.90

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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.