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Finding the Fourth Proportional to 278,978.52, 418,463.64 and 68,618.28

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Solution

The fourth proportional to 278,978.52, 418,463.64 and 68,618.28 is: 102,926.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,978.52 : 418,463.64 = 68,618.28 : x
  2. Step 2: Convert to fraction form
    278,978.52/418,463.64 = 68,618.28/x
  3. Step 3: Cross multiply
    278,978.52x = 418,463.64 × 68,618.28
  4. Step 4: Simplify right side
    278,978.52x = 28,714,255,219.34
  5. Step 5: Solve for x
    x = 28,714,255,219.34/278,978.52
  6. Step 6: Final answer
    x = 102,926.40

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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.