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Finding the Fourth Proportional to 402.12, 554.04 and 376.92

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Solution

The fourth proportional to 402.12, 554.04 and 376.92 is: 519.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.12 : 554.04 = 376.92 : x
  2. Step 2: Convert to fraction form
    402.12/554.04 = 376.92/x
  3. Step 3: Cross multiply
    402.12x = 554.04 × 376.92
  4. Step 4: Simplify right side
    402.12x = 208,828.76
  5. Step 5: Solve for x
    x = 208,828.76/402.12
  6. Step 6: Final answer
    x = 519.32

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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.