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Finding the Fourth Proportional to 368.99, 553.91 and 253.92

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Solution

The fourth proportional to 368.99, 553.91 and 253.92 is: 381.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.99 : 553.91 = 253.92 : x
  2. Step 2: Convert to fraction form
    368.99/553.91 = 253.92/x
  3. Step 3: Cross multiply
    368.99x = 553.91 × 253.92
  4. Step 4: Simplify right side
    368.99x = 140,647.56
  5. Step 5: Solve for x
    x = 140,647.56/368.99
  6. Step 6: Final answer
    x = 381.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.