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Finding the Fourth Proportional to 673.31, 929.09 and 378.54

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Solution

The fourth proportional to 673.31, 929.09 and 378.54 is: 522.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.31 : 929.09 = 378.54 : x
  2. Step 2: Convert to fraction form
    673.31/929.09 = 378.54/x
  3. Step 3: Cross multiply
    673.31x = 929.09 × 378.54
  4. Step 4: Simplify right side
    673.31x = 351,698.67
  5. Step 5: Solve for x
    x = 351,698.67/673.31
  6. Step 6: Final answer
    x = 522.34

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Double scale
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1.5x scale

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.