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Finding the Fourth Proportional to 699.29, 1,048.41 and 425.33

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Solution

The fourth proportional to 699.29, 1,048.41 and 425.33 is: 637.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.29 : 1,048.41 = 425.33 : x
  2. Step 2: Convert to fraction form
    699.29/1,048.41 = 425.33/x
  3. Step 3: Cross multiply
    699.29x = 1,048.41 × 425.33
  4. Step 4: Simplify right side
    699.29x = 445,920.23
  5. Step 5: Solve for x
    x = 445,920.23/699.29
  6. Step 6: Final answer
    x = 637.68

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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.