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Finding the Fourth Proportional to 499.95, 690.06 and 324.99

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Solution

The fourth proportional to 499.95, 690.06 and 324.99 is: 448.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.95 : 690.06 = 324.99 : x
  2. Step 2: Convert to fraction form
    499.95/690.06 = 324.99/x
  3. Step 3: Cross multiply
    499.95x = 690.06 × 324.99
  4. Step 4: Simplify right side
    499.95x = 224,262.60
  5. Step 5: Solve for x
    x = 224,262.60/499.95
  6. Step 6: Final answer
    x = 448.57

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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.