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Finding the Fourth Proportional to 476.38, 657.52 and 279.96

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Solution

The fourth proportional to 476.38, 657.52 and 279.96 is: 386.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.38 : 657.52 = 279.96 : x
  2. Step 2: Convert to fraction form
    476.38/657.52 = 279.96/x
  3. Step 3: Cross multiply
    476.38x = 657.52 × 279.96
  4. Step 4: Simplify right side
    476.38x = 184,074.61
  5. Step 5: Solve for x
    x = 184,074.61/476.38
  6. Step 6: Final answer
    x = 386.40

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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.