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Finding the Fourth Proportional to 959.49, 1,324.70 and 628.47

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Solution

The fourth proportional to 959.49, 1,324.70 and 628.47 is: 867.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.49 : 1,324.70 = 628.47 : x
  2. Step 2: Convert to fraction form
    959.49/1,324.70 = 628.47/x
  3. Step 3: Cross multiply
    959.49x = 1,324.70 × 628.47
  4. Step 4: Simplify right side
    959.49x = 832,531.07
  5. Step 5: Solve for x
    x = 832,531.07/959.49
  6. Step 6: Final answer
    x = 867.68

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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.