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Finding the Fourth Proportional to 674.08, 1,017.64 and 670.42

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Solution

The fourth proportional to 674.08, 1,017.64 and 670.42 is: 1,012.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.08 : 1,017.64 = 670.42 : x
  2. Step 2: Convert to fraction form
    674.08/1,017.64 = 670.42/x
  3. Step 3: Cross multiply
    674.08x = 1,017.64 × 670.42
  4. Step 4: Simplify right side
    674.08x = 682,246.21
  5. Step 5: Solve for x
    x = 682,246.21/674.08
  6. Step 6: Final answer
    x = 1,012.11

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.