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Finding the Fourth Proportional to 280,961,119.80, 421,441,679.70 and 280,961,119.80

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Solution

The fourth proportional to 280,961,119.80, 421,441,679.70 and 280,961,119.80 is: 421,441,679.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,961,119.80 : 421,441,679.70 = 280,961,119.80 : x
  2. Step 2: Convert to fraction form
    280,961,119.80/421,441,679.70 = 280,961,119.80/x
  3. Step 3: Cross multiply
    280,961,119.80x = 421,441,679.70 × 280,961,119.80
  4. Step 4: Simplify right side
    280,961,119.80x = 118,408,726,258,904,928
  5. Step 5: Solve for x
    x = 118,408,726,258,904,928/280,961,119.80
  6. Step 6: Final answer
    x = 421,441,679.70

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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.