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Finding the Fourth Proportional to 279,352.26, 419,023.53 and 68,990.40

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Solution

The fourth proportional to 279,352.26, 419,023.53 and 68,990.40 is: 103,484.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,352.26 : 419,023.53 = 68,990.40 : x
  2. Step 2: Convert to fraction form
    279,352.26/419,023.53 = 68,990.40/x
  3. Step 3: Cross multiply
    279,352.26x = 419,023.53 × 68,990.40
  4. Step 4: Simplify right side
    279,352.26x = 28,908,600,944.11
  5. Step 5: Solve for x
    x = 28,908,600,944.11/279,352.26
  6. Step 6: Final answer
    x = 103,484.40

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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.