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Finding the Fourth Proportional to 1,087.84, 1,630.88 and 439.04

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Solution

The fourth proportional to 1,087.84, 1,630.88 and 439.04 is: 658.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.84 : 1,630.88 = 439.04 : x
  2. Step 2: Convert to fraction form
    1,087.84/1,630.88 = 439.04/x
  3. Step 3: Cross multiply
    1,087.84x = 1,630.88 × 439.04
  4. Step 4: Simplify right side
    1,087.84x = 716,021.56
  5. Step 5: Solve for x
    x = 716,021.56/1,087.84
  6. Step 6: Final answer
    x = 658.20

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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.