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Finding the Fourth Proportional to 478.33, 654.41 and 476.28

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Solution

The fourth proportional to 478.33, 654.41 and 476.28 is: 651.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.33 : 654.41 = 476.28 : x
  2. Step 2: Convert to fraction form
    478.33/654.41 = 476.28/x
  3. Step 3: Cross multiply
    478.33x = 654.41 × 476.28
  4. Step 4: Simplify right side
    478.33x = 311,683.59
  5. Step 5: Solve for x
    x = 311,683.59/478.33
  6. Step 6: Final answer
    x = 651.61

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.