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Finding the Fourth Proportional to 476.44, 657.39 and 279.88

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Solution

The fourth proportional to 476.44, 657.39 and 279.88 is: 386.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.44 : 657.39 = 279.88 : x
  2. Step 2: Convert to fraction form
    476.44/657.39 = 279.88/x
  3. Step 3: Cross multiply
    476.44x = 657.39 × 279.88
  4. Step 4: Simplify right side
    476.44x = 183,990.31
  5. Step 5: Solve for x
    x = 183,990.31/476.44
  6. Step 6: Final answer
    x = 386.18

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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.