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Finding the Fourth Proportional to 483.64, 666.30 and 395.80

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Solution

The fourth proportional to 483.64, 666.30 and 395.80 is: 545.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.64 : 666.30 = 395.80 : x
  2. Step 2: Convert to fraction form
    483.64/666.30 = 395.80/x
  3. Step 3: Cross multiply
    483.64x = 666.30 × 395.80
  4. Step 4: Simplify right side
    483.64x = 263,721.54
  5. Step 5: Solve for x
    x = 263,721.54/483.64
  6. Step 6: Final answer
    x = 545.28

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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.