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Finding the Fourth Proportional to 280,212.44, 386,694.44 and 152,890.72

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Solution

The fourth proportional to 280,212.44, 386,694.44 and 152,890.72 is: 210,989.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,212.44 : 386,694.44 = 152,890.72 : x
  2. Step 2: Convert to fraction form
    280,212.44/386,694.44 = 152,890.72/x
  3. Step 3: Cross multiply
    280,212.44x = 386,694.44 × 152,890.72
  4. Step 4: Simplify right side
    280,212.44x = 59,121,991,351.60
  5. Step 5: Solve for x
    x = 59,121,991,351.60/280,212.44
  6. Step 6: Final answer
    x = 210,989.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.