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Finding the Fourth Proportional to 401.44, 551.66 and 383.36

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Solution

The fourth proportional to 401.44, 551.66 and 383.36 is: 526.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.44 : 551.66 = 383.36 : x
  2. Step 2: Convert to fraction form
    401.44/551.66 = 383.36/x
  3. Step 3: Cross multiply
    401.44x = 551.66 × 383.36
  4. Step 4: Simplify right side
    401.44x = 211,484.38
  5. Step 5: Solve for x
    x = 211,484.38/401.44
  6. Step 6: Final answer
    x = 526.81

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.