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Finding the Fourth Proportional to 702, 1,051.68 and 648.96

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Solution

The fourth proportional to 702, 1,051.68 and 648.96 is: 972.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    702 : 1,051.68 = 648.96 : x
  2. Step 2: Convert to fraction form
    702/1,051.68 = 648.96/x
  3. Step 3: Cross multiply
    702x = 1,051.68 × 648.96
  4. Step 4: Simplify right side
    702x = 682,498.25
  5. Step 5: Solve for x
    x = 682,498.25/702
  6. Step 6: Final answer
    x = 972.22

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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.