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Finding the Fourth Proportional to 673.72, 929.91 and 394.18

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Solution

The fourth proportional to 673.72, 929.91 and 394.18 is: 544.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.72 : 929.91 = 394.18 : x
  2. Step 2: Convert to fraction form
    673.72/929.91 = 394.18/x
  3. Step 3: Cross multiply
    673.72x = 929.91 × 394.18
  4. Step 4: Simplify right side
    673.72x = 366,551.92
  5. Step 5: Solve for x
    x = 366,551.92/673.72
  6. Step 6: Final answer
    x = 544.07

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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.