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Finding the Fourth Proportional to 356.01, 491.34 and 245.55

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Solution

The fourth proportional to 356.01, 491.34 and 245.55 is: 338.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.01 : 491.34 = 245.55 : x
  2. Step 2: Convert to fraction form
    356.01/491.34 = 245.55/x
  3. Step 3: Cross multiply
    356.01x = 491.34 × 245.55
  4. Step 4: Simplify right side
    356.01x = 120,648.54
  5. Step 5: Solve for x
    x = 120,648.54/356.01
  6. Step 6: Final answer
    x = 338.89

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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.