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Finding the Fourth Proportional to 703.11, 1,054.79 and 216.15

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Solution

The fourth proportional to 703.11, 1,054.79 and 216.15 is: 324.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.11 : 1,054.79 = 216.15 : x
  2. Step 2: Convert to fraction form
    703.11/1,054.79 = 216.15/x
  3. Step 3: Cross multiply
    703.11x = 1,054.79 × 216.15
  4. Step 4: Simplify right side
    703.11x = 227,991.78
  5. Step 5: Solve for x
    x = 227,991.78/703.11
  6. Step 6: Final answer
    x = 324.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.