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Finding the Fourth Proportional to 1,304.39, 1,800 and 714.92

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Solution

The fourth proportional to 1,304.39, 1,800 and 714.92 is: 986.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,304.39 : 1,800 = 714.92 : x
  2. Step 2: Convert to fraction form
    1,304.39/1,800 = 714.92/x
  3. Step 3: Cross multiply
    1,304.39x = 1,800 × 714.92
  4. Step 4: Simplify right side
    1,304.39x = 1,286,847
  5. Step 5: Solve for x
    x = 1,286,847/1,304.39
  6. Step 6: Final answer
    x = 986.55

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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.