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Finding the Fourth Proportional to 628.21, 866.93 and 348.45

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Solution

The fourth proportional to 628.21, 866.93 and 348.45 is: 480.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.21 : 866.93 = 348.45 : x
  2. Step 2: Convert to fraction form
    628.21/866.93 = 348.45/x
  3. Step 3: Cross multiply
    628.21x = 866.93 × 348.45
  4. Step 4: Simplify right side
    628.21x = 302,076.77
  5. Step 5: Solve for x
    x = 302,076.77/628.21
  6. Step 6: Final answer
    x = 480.85

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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.