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Finding the Fourth Proportional to 630.27, 945.09 and 485.64

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Solution

The fourth proportional to 630.27, 945.09 and 485.64 is: 728.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.27 : 945.09 = 485.64 : x
  2. Step 2: Convert to fraction form
    630.27/945.09 = 485.64/x
  3. Step 3: Cross multiply
    630.27x = 945.09 × 485.64
  4. Step 4: Simplify right side
    630.27x = 458,973.51
  5. Step 5: Solve for x
    x = 458,973.51/630.27
  6. Step 6: Final answer
    x = 728.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.