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Finding the Fourth Proportional to 499.64, 749.92 and 316.48

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Solution

The fourth proportional to 499.64, 749.92 and 316.48 is: 475.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.64 : 749.92 = 316.48 : x
  2. Step 2: Convert to fraction form
    499.64/749.92 = 316.48/x
  3. Step 3: Cross multiply
    499.64x = 749.92 × 316.48
  4. Step 4: Simplify right side
    499.64x = 237,334.68
  5. Step 5: Solve for x
    x = 237,334.68/499.64
  6. Step 6: Final answer
    x = 475.01

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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.