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Finding the Fourth Proportional to 668,860,978.40, 1,004,047,294.80 and 396,385,272.80

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Solution

The fourth proportional to 668,860,978.40, 1,004,047,294.80 and 396,385,272.80 is: 595,025,833.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,860,978.40 : 1,004,047,294.80 = 396,385,272.80 : x
  2. Step 2: Convert to fraction form
    668,860,978.40/1,004,047,294.80 = 396,385,272.80/x
  3. Step 3: Cross multiply
    668,860,978.40x = 1,004,047,294.80 × 396,385,272.80
  4. Step 4: Simplify right side
    668,860,978.40x = 397,989,560,853,400,000
  5. Step 5: Solve for x
    x = 397,989,560,853,400,000/668,860,978.40
  6. Step 6: Final answer
    x = 595,025,833.03

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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.