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Finding the Fourth Proportional to 456.11, 628.74 and 357.70

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Solution

The fourth proportional to 456.11, 628.74 and 357.70 is: 493.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.11 : 628.74 = 357.70 : x
  2. Step 2: Convert to fraction form
    456.11/628.74 = 357.70/x
  3. Step 3: Cross multiply
    456.11x = 628.74 × 357.70
  4. Step 4: Simplify right side
    456.11x = 224,896.94
  5. Step 5: Solve for x
    x = 224,896.94/456.11
  6. Step 6: Final answer
    x = 493.07

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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.