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Finding the Fourth Proportional to 849.95, 1,173.05 and 709.85

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Solution

The fourth proportional to 849.95, 1,173.05 and 709.85 is: 979.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.95 : 1,173.05 = 709.85 : x
  2. Step 2: Convert to fraction form
    849.95/1,173.05 = 709.85/x
  3. Step 3: Cross multiply
    849.95x = 1,173.05 × 709.85
  4. Step 4: Simplify right side
    849.95x = 832,680.13
  5. Step 5: Solve for x
    x = 832,680.13/849.95
  6. Step 6: Final answer
    x = 979.69

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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.