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Finding the Fourth Proportional to 673.94, 1,010.91 and 385.17

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Solution

The fourth proportional to 673.94, 1,010.91 and 385.17 is: 577.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.94 : 1,010.91 = 385.17 : x
  2. Step 2: Convert to fraction form
    673.94/1,010.91 = 385.17/x
  3. Step 3: Cross multiply
    673.94x = 1,010.91 × 385.17
  4. Step 4: Simplify right side
    673.94x = 389,372.29
  5. Step 5: Solve for x
    x = 389,372.29/673.94
  6. Step 6: Final answer
    x = 577.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.