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Finding the Fourth Proportional to 500.18, 690.12 and 325.49

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Solution

The fourth proportional to 500.18, 690.12 and 325.49 is: 449.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.18 : 690.12 = 325.49 : x
  2. Step 2: Convert to fraction form
    500.18/690.12 = 325.49/x
  3. Step 3: Cross multiply
    500.18x = 690.12 × 325.49
  4. Step 4: Simplify right side
    500.18x = 224,627.16
  5. Step 5: Solve for x
    x = 224,627.16/500.18
  6. Step 6: Final answer
    x = 449.09

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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.