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Finding the Fourth Proportional to 455.50, 628.92 and 357.07

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Solution

The fourth proportional to 455.50, 628.92 and 357.07 is: 493.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.50 : 628.92 = 357.07 : x
  2. Step 2: Convert to fraction form
    455.50/628.92 = 357.07/x
  3. Step 3: Cross multiply
    455.50x = 628.92 × 357.07
  4. Step 4: Simplify right side
    455.50x = 224,568.46
  5. Step 5: Solve for x
    x = 224,568.46/455.50
  6. Step 6: Final answer
    x = 493.02

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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.