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Finding the Fourth Proportional to 664,848,672.30, 997,273,008.45 and 389,349,657.90

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Solution

The fourth proportional to 664,848,672.30, 997,273,008.45 and 389,349,657.90 is: 584,024,486.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,848,672.30 : 997,273,008.45 = 389,349,657.90 : x
  2. Step 2: Convert to fraction form
    664,848,672.30/997,273,008.45 = 389,349,657.90/x
  3. Step 3: Cross multiply
    664,848,672.30x = 997,273,008.45 × 389,349,657.90
  4. Step 4: Simplify right side
    664,848,672.30x = 388,287,904,672,911,296
  5. Step 5: Solve for x
    x = 388,287,904,672,911,296/664,848,672.30
  6. Step 6: Final answer
    x = 584,024,486.85

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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.