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Finding the Fourth Proportional to 402.35, 554.65 and 277.81

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Solution

The fourth proportional to 402.35, 554.65 and 277.81 is: 382.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.35 : 554.65 = 277.81 : x
  2. Step 2: Convert to fraction form
    402.35/554.65 = 277.81/x
  3. Step 3: Cross multiply
    402.35x = 554.65 × 277.81
  4. Step 4: Simplify right side
    402.35x = 154,085.24
  5. Step 5: Solve for x
    x = 154,085.24/402.35
  6. Step 6: Final answer
    x = 382.96

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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.