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Finding the Fourth Proportional to 673.14, 1,009.98 and 326.45

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Solution

The fourth proportional to 673.14, 1,009.98 and 326.45 is: 489.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.14 : 1,009.98 = 326.45 : x
  2. Step 2: Convert to fraction form
    673.14/1,009.98 = 326.45/x
  3. Step 3: Cross multiply
    673.14x = 1,009.98 × 326.45
  4. Step 4: Simplify right side
    673.14x = 329,706.34
  5. Step 5: Solve for x
    x = 329,706.34/673.14
  6. Step 6: Final answer
    x = 489.80

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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.