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Finding the Fourth Proportional to 703.82, 1,053.56 and 487.28

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Solution

The fourth proportional to 703.82, 1,053.56 and 487.28 is: 729.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.82 : 1,053.56 = 487.28 : x
  2. Step 2: Convert to fraction form
    703.82/1,053.56 = 487.28/x
  3. Step 3: Cross multiply
    703.82x = 1,053.56 × 487.28
  4. Step 4: Simplify right side
    703.82x = 513,378.72
  5. Step 5: Solve for x
    x = 513,378.72/703.82
  6. Step 6: Final answer
    x = 729.42

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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.