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Finding the Fourth Proportional to 703.21, 1,054.17 and 270.28

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Solution

The fourth proportional to 703.21, 1,054.17 and 270.28 is: 405.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.21 : 1,054.17 = 270.28 : x
  2. Step 2: Convert to fraction form
    703.21/1,054.17 = 270.28/x
  3. Step 3: Cross multiply
    703.21x = 1,054.17 × 270.28
  4. Step 4: Simplify right side
    703.21x = 284,921.07
  5. Step 5: Solve for x
    x = 284,921.07/703.21
  6. Step 6: Final answer
    x = 405.17

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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.