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Finding the Fourth Proportional to 674.56, 1,012.16 and 401.19

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Solution

The fourth proportional to 674.56, 1,012.16 and 401.19 is: 601.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.56 : 1,012.16 = 401.19 : x
  2. Step 2: Convert to fraction form
    674.56/1,012.16 = 401.19/x
  3. Step 3: Cross multiply
    674.56x = 1,012.16 × 401.19
  4. Step 4: Simplify right side
    674.56x = 406,068.47
  5. Step 5: Solve for x
    x = 406,068.47/674.56
  6. Step 6: Final answer
    x = 601.98

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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.