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Finding the Fourth Proportional to 673.01, 928.90 and 393.24

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Solution

The fourth proportional to 673.01, 928.90 and 393.24 is: 542.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.01 : 928.90 = 393.24 : x
  2. Step 2: Convert to fraction form
    673.01/928.90 = 393.24/x
  3. Step 3: Cross multiply
    673.01x = 928.90 × 393.24
  4. Step 4: Simplify right side
    673.01x = 365,280.64
  5. Step 5: Solve for x
    x = 365,280.64/673.01
  6. Step 6: Final answer
    x = 542.76

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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.