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Finding the Fourth Proportional to 673.67, 929.72 and 393.84

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Solution

The fourth proportional to 673.67, 929.72 and 393.84 is: 543.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.67 : 929.72 = 393.84 : x
  2. Step 2: Convert to fraction form
    673.67/929.72 = 393.84/x
  3. Step 3: Cross multiply
    673.67x = 929.72 × 393.84
  4. Step 4: Simplify right side
    673.67x = 366,161.91
  5. Step 5: Solve for x
    x = 366,161.91/673.67
  6. Step 6: Final answer
    x = 543.53

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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.