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Finding the Fourth Proportional to 280,743,872.40, 421,115,808.60 and 280,743,872.40

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Solution

The fourth proportional to 280,743,872.40, 421,115,808.60 and 280,743,872.40 is: 421,115,808.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,743,872.40 : 421,115,808.60 = 280,743,872.40 : x
  2. Step 2: Convert to fraction form
    280,743,872.40/421,115,808.60 = 280,743,872.40/x
  3. Step 3: Cross multiply
    280,743,872.40x = 421,115,808.60 × 280,743,872.40
  4. Step 4: Simplify right side
    280,743,872.40x = 118,225,682,835,221,216
  5. Step 5: Solve for x
    x = 118,225,682,835,221,216/280,743,872.40
  6. Step 6: Final answer
    x = 421,115,808.60

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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.