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Finding the Fourth Proportional to 696.43, 1,045.07 and 404.50

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Solution

The fourth proportional to 696.43, 1,045.07 and 404.50 is: 606.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.43 : 1,045.07 = 404.50 : x
  2. Step 2: Convert to fraction form
    696.43/1,045.07 = 404.50/x
  3. Step 3: Cross multiply
    696.43x = 1,045.07 × 404.50
  4. Step 4: Simplify right side
    696.43x = 422,726.18
  5. Step 5: Solve for x
    x = 422,726.18/696.43
  6. Step 6: Final answer
    x = 606.99

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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.