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Finding the Fourth Proportional to 676.37, 1,013.93 and 286.16

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Solution

The fourth proportional to 676.37, 1,013.93 and 286.16 is: 428.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.37 : 1,013.93 = 286.16 : x
  2. Step 2: Convert to fraction form
    676.37/1,013.93 = 286.16/x
  3. Step 3: Cross multiply
    676.37x = 1,013.93 × 286.16
  4. Step 4: Simplify right side
    676.37x = 290,140.78
  5. Step 5: Solve for x
    x = 290,140.78/676.37
  6. Step 6: Final answer
    x = 428.97

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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.