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Finding the Fourth Proportional to 669.99, 925.12 and 523.05

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Solution

The fourth proportional to 669.99, 925.12 and 523.05 is: 722.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.99 : 925.12 = 523.05 : x
  2. Step 2: Convert to fraction form
    669.99/925.12 = 523.05/x
  3. Step 3: Cross multiply
    669.99x = 925.12 × 523.05
  4. Step 4: Simplify right side
    669.99x = 483,884.02
  5. Step 5: Solve for x
    x = 483,884.02/669.99
  6. Step 6: Final answer
    x = 722.23

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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.