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Finding the Fourth Proportional to 5,318,918, 7,978,377 and 1,329,830

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Solution

The fourth proportional to 5,318,918, 7,978,377 and 1,329,830 is: 1,994,745

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,318,918 : 7,978,377 = 1,329,830 : x
  2. Step 2: Convert to fraction form
    5,318,918/7,978,377 = 1,329,830/x
  3. Step 3: Cross multiply
    5,318,918x = 7,978,377 × 1,329,830
  4. Step 4: Simplify right side
    5,318,918x = 10,609,885,085,910
  5. Step 5: Solve for x
    x = 10,609,885,085,910/5,318,918
  6. Step 6: Final answer
    x = 1,994,745

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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.