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Finding the Fourth Proportional to 446.77, 669.09 and 381.40

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Solution

The fourth proportional to 446.77, 669.09 and 381.40 is: 571.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.77 : 669.09 = 381.40 : x
  2. Step 2: Convert to fraction form
    446.77/669.09 = 381.40/x
  3. Step 3: Cross multiply
    446.77x = 669.09 × 381.40
  4. Step 4: Simplify right side
    446.77x = 255,190.93
  5. Step 5: Solve for x
    x = 255,190.93/446.77
  6. Step 6: Final answer
    x = 571.19

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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.