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Finding the Fourth Proportional to 456.45, 630.10 and 351.49

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Solution

The fourth proportional to 456.45, 630.10 and 351.49 is: 485.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.45 : 630.10 = 351.49 : x
  2. Step 2: Convert to fraction form
    456.45/630.10 = 351.49/x
  3. Step 3: Cross multiply
    456.45x = 630.10 × 351.49
  4. Step 4: Simplify right side
    456.45x = 221,473.85
  5. Step 5: Solve for x
    x = 221,473.85/456.45
  6. Step 6: Final answer
    x = 485.21

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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.