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Finding the Fourth Proportional to 850.62, 1,173.15 and 647.97

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Solution

The fourth proportional to 850.62, 1,173.15 and 647.97 is: 893.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.62 : 1,173.15 = 647.97 : x
  2. Step 2: Convert to fraction form
    850.62/1,173.15 = 647.97/x
  3. Step 3: Cross multiply
    850.62x = 1,173.15 × 647.97
  4. Step 4: Simplify right side
    850.62x = 760,166.01
  5. Step 5: Solve for x
    x = 760,166.01/850.62
  6. Step 6: Final answer
    x = 893.66

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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.