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Finding the Fourth Proportional to 556.81, 768.30 and 357.68

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Solution

The fourth proportional to 556.81, 768.30 and 357.68 is: 493.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.81 : 768.30 = 357.68 : x
  2. Step 2: Convert to fraction form
    556.81/768.30 = 357.68/x
  3. Step 3: Cross multiply
    556.81x = 768.30 × 357.68
  4. Step 4: Simplify right side
    556.81x = 274,808.14
  5. Step 5: Solve for x
    x = 274,808.14/556.81
  6. Step 6: Final answer
    x = 493.54

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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.