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Finding the Fourth Proportional to 511,978.17, 768,310.05 and 212,459.04

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Solution

The fourth proportional to 511,978.17, 768,310.05 and 212,459.04 is: 318,830.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,978.17 : 768,310.05 = 212,459.04 : x
  2. Step 2: Convert to fraction form
    511,978.17/768,310.05 = 212,459.04/x
  3. Step 3: Cross multiply
    511,978.17x = 768,310.05 × 212,459.04
  4. Step 4: Simplify right side
    511,978.17x = 163,234,415,645.35
  5. Step 5: Solve for x
    x = 163,234,415,645.35/511,978.17
  6. Step 6: Final answer
    x = 318,830.81

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.