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Finding the Fourth Proportional to 481,860, 664,976.40 and 280,668.96

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Solution

The fourth proportional to 481,860, 664,976.40 and 280,668.96 is: 387,328.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,860 : 664,976.40 = 280,668.96 : x
  2. Step 2: Convert to fraction form
    481,860/664,976.40 = 280,668.96/x
  3. Step 3: Cross multiply
    481,860x = 664,976.40 × 280,668.96
  4. Step 4: Simplify right side
    481,860x = 186,638,234,612.54
  5. Step 5: Solve for x
    x = 186,638,234,612.54/481,860
  6. Step 6: Final answer
    x = 387,328.76

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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.