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Finding the Fourth Proportional to 455.93, 628.44 and 357.51

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Solution

The fourth proportional to 455.93, 628.44 and 357.51 is: 492.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.93 : 628.44 = 357.51 : x
  2. Step 2: Convert to fraction form
    455.93/628.44 = 357.51/x
  3. Step 3: Cross multiply
    455.93x = 628.44 × 357.51
  4. Step 4: Simplify right side
    455.93x = 224,673.58
  5. Step 5: Solve for x
    x = 224,673.58/455.93
  6. Step 6: Final answer
    x = 492.79

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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.