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Finding the Fourth Proportional to 797.45, 1,098.97 and 717.93

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Solution

The fourth proportional to 797.45, 1,098.97 and 717.93 is: 989.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    797.45 : 1,098.97 = 717.93 : x
  2. Step 2: Convert to fraction form
    797.45/1,098.97 = 717.93/x
  3. Step 3: Cross multiply
    797.45x = 1,098.97 × 717.93
  4. Step 4: Simplify right side
    797.45x = 788,981.74
  5. Step 5: Solve for x
    x = 788,981.74/797.45
  6. Step 6: Final answer
    x = 989.39

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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.