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Finding the Fourth Proportional to 696.98, 961.39 and 431.35

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Solution

The fourth proportional to 696.98, 961.39 and 431.35 is: 594.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.98 : 961.39 = 431.35 : x
  2. Step 2: Convert to fraction form
    696.98/961.39 = 431.35/x
  3. Step 3: Cross multiply
    696.98x = 961.39 × 431.35
  4. Step 4: Simplify right side
    696.98x = 414,695.58
  5. Step 5: Solve for x
    x = 414,695.58/696.98
  6. Step 6: Final answer
    x = 594.99

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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.