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Finding the Fourth Proportional to 280,628.55, 420,942.83 and 280,628.55

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Solution

The fourth proportional to 280,628.55, 420,942.83 and 280,628.55 is: 420,942.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,628.55 : 420,942.83 = 280,628.55 : x
  2. Step 2: Convert to fraction form
    280,628.55/420,942.83 = 280,628.55/x
  3. Step 3: Cross multiply
    280,628.55x = 420,942.83 × 280,628.55
  4. Step 4: Simplify right side
    280,628.55x = 118,128,574,612.65
  5. Step 5: Solve for x
    x = 118,128,574,612.65/280,628.55
  6. Step 6: Final answer
    x = 420,942.83

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1.5x scale

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.