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Finding the Fourth Proportional to 673.89, 930.07 and 394.12

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Solution

The fourth proportional to 673.89, 930.07 and 394.12 is: 543.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.89 : 930.07 = 394.12 : x
  2. Step 2: Convert to fraction form
    673.89/930.07 = 394.12/x
  3. Step 3: Cross multiply
    673.89x = 930.07 × 394.12
  4. Step 4: Simplify right side
    673.89x = 366,557.36
  5. Step 5: Solve for x
    x = 366,557.36/673.89
  6. Step 6: Final answer
    x = 543.94

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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.