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Finding the Fourth Proportional to 280,252,685.10, 420,379,027.65 and 280,252,685.10

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Solution

The fourth proportional to 280,252,685.10, 420,379,027.65 and 280,252,685.10 is: 420,379,027.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,252,685.10 : 420,379,027.65 = 280,252,685.10 : x
  2. Step 2: Convert to fraction form
    280,252,685.10/420,379,027.65 = 280,252,685.10/x
  3. Step 3: Cross multiply
    280,252,685.10x = 420,379,027.65 × 280,252,685.10
  4. Step 4: Simplify right side
    280,252,685.10x = 117,812,351,258,639,648
  5. Step 5: Solve for x
    x = 117,812,351,258,639,648/280,252,685.10
  6. Step 6: Final answer
    x = 420,379,027.65

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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.