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Finding the Fourth Proportional to 279,988.74, 419,984.78 and 69,626.68

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Solution

The fourth proportional to 279,988.74, 419,984.78 and 69,626.68 is: 104,440.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,988.74 : 419,984.78 = 69,626.68 : x
  2. Step 2: Convert to fraction form
    279,988.74/419,984.78 = 69,626.68/x
  3. Step 3: Cross multiply
    279,988.74x = 419,984.78 × 69,626.68
  4. Step 4: Simplify right side
    279,988.74x = 29,242,145,881.93
  5. Step 5: Solve for x
    x = 29,242,145,881.93/279,988.74
  6. Step 6: Final answer
    x = 104,440.44

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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.