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Finding the Fourth Proportional to 499, 688.62 and 324.64

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Solution

The fourth proportional to 499, 688.62 and 324.64 is: 448.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    499 : 688.62 = 324.64 : x
  2. Step 2: Convert to fraction form
    499/688.62 = 324.64/x
  3. Step 3: Cross multiply
    499x = 688.62 × 324.64
  4. Step 4: Simplify right side
    499x = 223,553.60
  5. Step 5: Solve for x
    x = 223,553.60/499
  6. Step 6: Final answer
    x = 448.00

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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.