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Finding the Fourth Proportional to 471.72, 651.07 and 316.38

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Solution

The fourth proportional to 471.72, 651.07 and 316.38 is: 436.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.72 : 651.07 = 316.38 : x
  2. Step 2: Convert to fraction form
    471.72/651.07 = 316.38/x
  3. Step 3: Cross multiply
    471.72x = 651.07 × 316.38
  4. Step 4: Simplify right side
    471.72x = 205,981.48
  5. Step 5: Solve for x
    x = 205,981.48/471.72
  6. Step 6: Final answer
    x = 436.67

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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.