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Finding the Fourth Proportional to 669.24, 923.54 and 403.72

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Solution

The fourth proportional to 669.24, 923.54 and 403.72 is: 557.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.24 : 923.54 = 403.72 : x
  2. Step 2: Convert to fraction form
    669.24/923.54 = 403.72/x
  3. Step 3: Cross multiply
    669.24x = 923.54 × 403.72
  4. Step 4: Simplify right side
    669.24x = 372,851.57
  5. Step 5: Solve for x
    x = 372,851.57/669.24
  6. Step 6: Final answer
    x = 557.13

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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.