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Finding the Fourth Proportional to 661.93, 917.64 and 626.82

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Solution

The fourth proportional to 661.93, 917.64 and 626.82 is: 868.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.93 : 917.64 = 626.82 : x
  2. Step 2: Convert to fraction form
    661.93/917.64 = 626.82/x
  3. Step 3: Cross multiply
    661.93x = 917.64 × 626.82
  4. Step 4: Simplify right side
    661.93x = 575,193.84
  5. Step 5: Solve for x
    x = 575,193.84/661.93
  6. Step 6: Final answer
    x = 868.97

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.