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Finding the Fourth Proportional to 401.50, 553.82 and 277.10

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Solution

The fourth proportional to 401.50, 553.82 and 277.10 is: 382.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.50 : 553.82 = 277.10 : x
  2. Step 2: Convert to fraction form
    401.50/553.82 = 277.10/x
  3. Step 3: Cross multiply
    401.50x = 553.82 × 277.10
  4. Step 4: Simplify right side
    401.50x = 153,459.37
  5. Step 5: Solve for x
    x = 153,459.37/401.50
  6. Step 6: Final answer
    x = 382.22

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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.