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Finding the Fourth Proportional to 697.80, 1,047.92 and 673.50

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Solution

The fourth proportional to 697.80, 1,047.92 and 673.50 is: 1,011.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.80 : 1,047.92 = 673.50 : x
  2. Step 2: Convert to fraction form
    697.80/1,047.92 = 673.50/x
  3. Step 3: Cross multiply
    697.80x = 1,047.92 × 673.50
  4. Step 4: Simplify right side
    697.80x = 705,770.75
  5. Step 5: Solve for x
    x = 705,770.75/697.80
  6. Step 6: Final answer
    x = 1,011.42

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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.