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Finding the Fourth Proportional to 483.32, 671.60 and 478.30

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Solution

The fourth proportional to 483.32, 671.60 and 478.30 is: 664.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.32 : 671.60 = 478.30 : x
  2. Step 2: Convert to fraction form
    483.32/671.60 = 478.30/x
  3. Step 3: Cross multiply
    483.32x = 671.60 × 478.30
  4. Step 4: Simplify right side
    483.32x = 321,226.28
  5. Step 5: Solve for x
    x = 321,226.28/483.32
  6. Step 6: Final answer
    x = 664.62

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.