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Finding the Fourth Proportional to 1,765.72, 2,648.67 and 670.17

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Solution

The fourth proportional to 1,765.72, 2,648.67 and 670.17 is: 1,005.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,765.72 : 2,648.67 = 670.17 : x
  2. Step 2: Convert to fraction form
    1,765.72/2,648.67 = 670.17/x
  3. Step 3: Cross multiply
    1,765.72x = 2,648.67 × 670.17
  4. Step 4: Simplify right side
    1,765.72x = 1,775,072.25
  5. Step 5: Solve for x
    x = 1,775,072.25/1,765.72
  6. Step 6: Final answer
    x = 1,005.29

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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.