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Finding the Fourth Proportional to 673.84, 1,010.43 and 251.55

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Solution

The fourth proportional to 673.84, 1,010.43 and 251.55 is: 377.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.84 : 1,010.43 = 251.55 : x
  2. Step 2: Convert to fraction form
    673.84/1,010.43 = 251.55/x
  3. Step 3: Cross multiply
    673.84x = 1,010.43 × 251.55
  4. Step 4: Simplify right side
    673.84x = 254,173.67
  5. Step 5: Solve for x
    x = 254,173.67/673.84
  6. Step 6: Final answer
    x = 377.20

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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.