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Finding the Fourth Proportional to 717.95, 982.29 and 715.25

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Solution

The fourth proportional to 717.95, 982.29 and 715.25 is: 978.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.95 : 982.29 = 715.25 : x
  2. Step 2: Convert to fraction form
    717.95/982.29 = 715.25/x
  3. Step 3: Cross multiply
    717.95x = 982.29 × 715.25
  4. Step 4: Simplify right side
    717.95x = 702,578.01
  5. Step 5: Solve for x
    x = 702,578.01/717.95
  6. Step 6: Final answer
    x = 978.60

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.