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Finding the Fourth Proportional to 456.55, 630.09 and 351.79

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Solution

The fourth proportional to 456.55, 630.09 and 351.79 is: 485.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.55 : 630.09 = 351.79 : x
  2. Step 2: Convert to fraction form
    456.55/630.09 = 351.79/x
  3. Step 3: Cross multiply
    456.55x = 630.09 × 351.79
  4. Step 4: Simplify right side
    456.55x = 221,659.36
  5. Step 5: Solve for x
    x = 221,659.36/456.55
  6. Step 6: Final answer
    x = 485.51

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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.