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Finding the Fourth Proportional to 673.47, 1,010.21 and 211.23

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Solution

The fourth proportional to 673.47, 1,010.21 and 211.23 is: 316.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.47 : 1,010.21 = 211.23 : x
  2. Step 2: Convert to fraction form
    673.47/1,010.21 = 211.23/x
  3. Step 3: Cross multiply
    673.47x = 1,010.21 × 211.23
  4. Step 4: Simplify right side
    673.47x = 213,386.66
  5. Step 5: Solve for x
    x = 213,386.66/673.47
  6. Step 6: Final answer
    x = 316.85

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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.