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Finding the Fourth Proportional to 849.06, 1,171.85 and 708.98

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Solution

The fourth proportional to 849.06, 1,171.85 and 708.98 is: 978.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.06 : 1,171.85 = 708.98 : x
  2. Step 2: Convert to fraction form
    849.06/1,171.85 = 708.98/x
  3. Step 3: Cross multiply
    849.06x = 1,171.85 × 708.98
  4. Step 4: Simplify right side
    849.06x = 830,808.81
  5. Step 5: Solve for x
    x = 830,808.81/849.06
  6. Step 6: Final answer
    x = 978.50

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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.