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Finding the Fourth Proportional to 817.35, 1,127.57 and 617.82

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Solution

The fourth proportional to 817.35, 1,127.57 and 617.82 is: 852.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    817.35 : 1,127.57 = 617.82 : x
  2. Step 2: Convert to fraction form
    817.35/1,127.57 = 617.82/x
  3. Step 3: Cross multiply
    817.35x = 1,127.57 × 617.82
  4. Step 4: Simplify right side
    817.35x = 696,635.30
  5. Step 5: Solve for x
    x = 696,635.30/817.35
  6. Step 6: Final answer
    x = 852.31

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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.