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Finding the Fourth Proportional to 659.84, 908.73 and 645.49

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Solution

The fourth proportional to 659.84, 908.73 and 645.49 is: 888.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.84 : 908.73 = 645.49 : x
  2. Step 2: Convert to fraction form
    659.84/908.73 = 645.49/x
  3. Step 3: Cross multiply
    659.84x = 908.73 × 645.49
  4. Step 4: Simplify right side
    659.84x = 586,576.13
  5. Step 5: Solve for x
    x = 586,576.13/659.84
  6. Step 6: Final answer
    x = 888.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.