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Finding the Fourth Proportional to 696.90, 961.88 and 417.30

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Solution

The fourth proportional to 696.90, 961.88 and 417.30 is: 575.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.90 : 961.88 = 417.30 : x
  2. Step 2: Convert to fraction form
    696.90/961.88 = 417.30/x
  3. Step 3: Cross multiply
    696.90x = 961.88 × 417.30
  4. Step 4: Simplify right side
    696.90x = 401,387.71
  5. Step 5: Solve for x
    x = 401,387.71/696.90
  6. Step 6: Final answer
    x = 575.97

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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.