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Finding the Fourth Proportional to 443.05, 611.10 and 383.93

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Solution

The fourth proportional to 443.05, 611.10 and 383.93 is: 529.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.05 : 611.10 = 383.93 : x
  2. Step 2: Convert to fraction form
    443.05/611.10 = 383.93/x
  3. Step 3: Cross multiply
    443.05x = 611.10 × 383.93
  4. Step 4: Simplify right side
    443.05x = 234,617.70
  5. Step 5: Solve for x
    x = 234,617.70/443.05
  6. Step 6: Final answer
    x = 529.55

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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.