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Finding the Fourth Proportional to 687.18, 941.01 and 659.64

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Solution

The fourth proportional to 687.18, 941.01 and 659.64 is: 903.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.18 : 941.01 = 659.64 : x
  2. Step 2: Convert to fraction form
    687.18/941.01 = 659.64/x
  3. Step 3: Cross multiply
    687.18x = 941.01 × 659.64
  4. Step 4: Simplify right side
    687.18x = 620,727.84
  5. Step 5: Solve for x
    x = 620,727.84/687.18
  6. Step 6: Final answer
    x = 903.30

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.