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Finding the Fourth Proportional to 962.89, 1,328.30 and 817.09

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Solution

The fourth proportional to 962.89, 1,328.30 and 817.09 is: 1,127.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.89 : 1,328.30 = 817.09 : x
  2. Step 2: Convert to fraction form
    962.89/1,328.30 = 817.09/x
  3. Step 3: Cross multiply
    962.89x = 1,328.30 × 817.09
  4. Step 4: Simplify right side
    962.89x = 1,085,336.30
  5. Step 5: Solve for x
    x = 1,085,336.30/962.89
  6. Step 6: Final answer
    x = 1,127.17

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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.