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Finding the Fourth Proportional to 313.90, 433.20 and 174.03

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Solution

The fourth proportional to 313.90, 433.20 and 174.03 is: 240.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.90 : 433.20 = 174.03 : x
  2. Step 2: Convert to fraction form
    313.90/433.20 = 174.03/x
  3. Step 3: Cross multiply
    313.90x = 433.20 × 174.03
  4. Step 4: Simplify right side
    313.90x = 75,389.19
  5. Step 5: Solve for x
    x = 75,389.19/313.90
  6. Step 6: Final answer
    x = 240.17

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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.