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Finding the Fourth Proportional to 849, 1,173.58 and 708.30

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Solution

The fourth proportional to 849, 1,173.58 and 708.30 is: 979.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    849 : 1,173.58 = 708.30 : x
  2. Step 2: Convert to fraction form
    849/1,173.58 = 708.30/x
  3. Step 3: Cross multiply
    849x = 1,173.58 × 708.30
  4. Step 4: Simplify right side
    849x = 831,243.20
  5. Step 5: Solve for x
    x = 831,243.20/849
  6. Step 6: Final answer
    x = 979.09

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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.