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Finding the Fourth Proportional to 673.90, 929.93 and 379.22

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Solution

The fourth proportional to 673.90, 929.93 and 379.22 is: 523.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.90 : 929.93 = 379.22 : x
  2. Step 2: Convert to fraction form
    673.90/929.93 = 379.22/x
  3. Step 3: Cross multiply
    673.90x = 929.93 × 379.22
  4. Step 4: Simplify right side
    673.90x = 352,641.51
  5. Step 5: Solve for x
    x = 352,641.51/673.90
  6. Step 6: Final answer
    x = 523.29

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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.