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Finding the Fourth Proportional to 850.59, 1,173.09 and 718.46

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Solution

The fourth proportional to 850.59, 1,173.09 and 718.46 is: 990.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.59 : 1,173.09 = 718.46 : x
  2. Step 2: Convert to fraction form
    850.59/1,173.09 = 718.46/x
  3. Step 3: Cross multiply
    850.59x = 1,173.09 × 718.46
  4. Step 4: Simplify right side
    850.59x = 842,818.24
  5. Step 5: Solve for x
    x = 842,818.24/850.59
  6. Step 6: Final answer
    x = 990.86

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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.