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Finding the Fourth Proportional to 402.02, 554.41 and 277.48

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Solution

The fourth proportional to 402.02, 554.41 and 277.48 is: 382.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.02 : 554.41 = 277.48 : x
  2. Step 2: Convert to fraction form
    402.02/554.41 = 277.48/x
  3. Step 3: Cross multiply
    402.02x = 554.41 × 277.48
  4. Step 4: Simplify right side
    402.02x = 153,837.69
  5. Step 5: Solve for x
    x = 153,837.69/402.02
  6. Step 6: Final answer
    x = 382.66

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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.