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Finding the Fourth Proportional to 1,029.53, 1,418.96 and 697.83

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Solution

The fourth proportional to 1,029.53, 1,418.96 and 697.83 is: 961.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,029.53 : 1,418.96 = 697.83 : x
  2. Step 2: Convert to fraction form
    1,029.53/1,418.96 = 697.83/x
  3. Step 3: Cross multiply
    1,029.53x = 1,418.96 × 697.83
  4. Step 4: Simplify right side
    1,029.53x = 990,189.37
  5. Step 5: Solve for x
    x = 990,189.37/1,029.53
  6. Step 6: Final answer
    x = 961.79

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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.