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Finding the Fourth Proportional to 418,962.98, 628,435.97 and 103,422.62

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Solution

The fourth proportional to 418,962.98, 628,435.97 and 103,422.62 is: 155,131.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,962.98 : 628,435.97 = 103,422.62 : x
  2. Step 2: Convert to fraction form
    418,962.98/628,435.97 = 103,422.62/x
  3. Step 3: Cross multiply
    418,962.98x = 628,435.97 × 103,422.62
  4. Step 4: Simplify right side
    418,962.98x = 64,994,494,002.53
  5. Step 5: Solve for x
    x = 64,994,494,002.53/418,962.98
  6. Step 6: Final answer
    x = 155,131.83

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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.