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Finding the Fourth Proportional to 673.20, 929 and 440.32

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Solution

The fourth proportional to 673.20, 929 and 440.32 is: 607.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.20 : 929 = 440.32 : x
  2. Step 2: Convert to fraction form
    673.20/929 = 440.32/x
  3. Step 3: Cross multiply
    673.20x = 929 × 440.32
  4. Step 4: Simplify right side
    673.20x = 409,057.28
  5. Step 5: Solve for x
    x = 409,057.28/673.20
  6. Step 6: Final answer
    x = 607.63

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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.