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Finding the Fourth Proportional to 474.17, 711.45 and 320.67

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Solution

The fourth proportional to 474.17, 711.45 and 320.67 is: 481.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.17 : 711.45 = 320.67 : x
  2. Step 2: Convert to fraction form
    474.17/711.45 = 320.67/x
  3. Step 3: Cross multiply
    474.17x = 711.45 × 320.67
  4. Step 4: Simplify right side
    474.17x = 228,140.67
  5. Step 5: Solve for x
    x = 228,140.67/474.17
  6. Step 6: Final answer
    x = 481.14

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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.