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Finding the Fourth Proportional to 859.24, 1,185.88 and 637.84

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Solution

The fourth proportional to 859.24, 1,185.88 and 637.84 is: 880.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    859.24 : 1,185.88 = 637.84 : x
  2. Step 2: Convert to fraction form
    859.24/1,185.88 = 637.84/x
  3. Step 3: Cross multiply
    859.24x = 1,185.88 × 637.84
  4. Step 4: Simplify right side
    859.24x = 756,401.70
  5. Step 5: Solve for x
    x = 756,401.70/859.24
  6. Step 6: Final answer
    x = 880.31

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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.