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Finding the Fourth Proportional to 673.26, 929.16 and 393.63

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Solution

The fourth proportional to 673.26, 929.16 and 393.63 is: 543.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.26 : 929.16 = 393.63 : x
  2. Step 2: Convert to fraction form
    673.26/929.16 = 393.63/x
  3. Step 3: Cross multiply
    673.26x = 929.16 × 393.63
  4. Step 4: Simplify right side
    673.26x = 365,745.25
  5. Step 5: Solve for x
    x = 365,745.25/673.26
  6. Step 6: Final answer
    x = 543.25

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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.