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Finding the Fourth Proportional to 478.14, 659.79 and 303.45

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Solution

The fourth proportional to 478.14, 659.79 and 303.45 is: 418.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.14 : 659.79 = 303.45 : x
  2. Step 2: Convert to fraction form
    478.14/659.79 = 303.45/x
  3. Step 3: Cross multiply
    478.14x = 659.79 × 303.45
  4. Step 4: Simplify right side
    478.14x = 200,213.28
  5. Step 5: Solve for x
    x = 200,213.28/478.14
  6. Step 6: Final answer
    x = 418.73

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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.