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Finding the Fourth Proportional to 669.72, 923.72 and 433.72

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Solution

The fourth proportional to 669.72, 923.72 and 433.72 is: 598.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.72 : 923.72 = 433.72 : x
  2. Step 2: Convert to fraction form
    669.72/923.72 = 433.72/x
  3. Step 3: Cross multiply
    669.72x = 923.72 × 433.72
  4. Step 4: Simplify right side
    669.72x = 400,635.84
  5. Step 5: Solve for x
    x = 400,635.84/669.72
  6. Step 6: Final answer
    x = 598.21

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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.