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Finding the Fourth Proportional to 486.72, 672.32 and 376.32

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Solution

The fourth proportional to 486.72, 672.32 and 376.32 is: 519.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.72 : 672.32 = 376.32 : x
  2. Step 2: Convert to fraction form
    486.72/672.32 = 376.32/x
  3. Step 3: Cross multiply
    486.72x = 672.32 × 376.32
  4. Step 4: Simplify right side
    486.72x = 253,007.46
  5. Step 5: Solve for x
    x = 253,007.46/486.72
  6. Step 6: Final answer
    x = 519.82

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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.