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Finding the Fourth Proportional to 676.52, 1,015.08 and 647.36

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Solution

The fourth proportional to 676.52, 1,015.08 and 647.36 is: 971.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.52 : 1,015.08 = 647.36 : x
  2. Step 2: Convert to fraction form
    676.52/1,015.08 = 647.36/x
  3. Step 3: Cross multiply
    676.52x = 1,015.08 × 647.36
  4. Step 4: Simplify right side
    676.52x = 657,122.19
  5. Step 5: Solve for x
    x = 657,122.19/676.52
  6. Step 6: Final answer
    x = 971.33

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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.