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Finding the Fourth Proportional to 959.89, 1,325.26 and 628.88

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Solution

The fourth proportional to 959.89, 1,325.26 and 628.88 is: 868.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.89 : 1,325.26 = 628.88 : x
  2. Step 2: Convert to fraction form
    959.89/1,325.26 = 628.88/x
  3. Step 3: Cross multiply
    959.89x = 1,325.26 × 628.88
  4. Step 4: Simplify right side
    959.89x = 833,429.51
  5. Step 5: Solve for x
    x = 833,429.51/959.89
  6. Step 6: Final answer
    x = 868.26

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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.