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Finding the Fourth Proportional to 443.64, 611.74 and 277.81

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Solution

The fourth proportional to 443.64, 611.74 and 277.81 is: 383.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.64 : 611.74 = 277.81 : x
  2. Step 2: Convert to fraction form
    443.64/611.74 = 277.81/x
  3. Step 3: Cross multiply
    443.64x = 611.74 × 277.81
  4. Step 4: Simplify right side
    443.64x = 169,947.49
  5. Step 5: Solve for x
    x = 169,947.49/443.64
  6. Step 6: Final answer
    x = 383.08

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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.