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Finding the Fourth Proportional to 842.27, 1,162.36 and 469.28

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Solution

The fourth proportional to 842.27, 1,162.36 and 469.28 is: 647.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.27 : 1,162.36 = 469.28 : x
  2. Step 2: Convert to fraction form
    842.27/1,162.36 = 469.28/x
  3. Step 3: Cross multiply
    842.27x = 1,162.36 × 469.28
  4. Step 4: Simplify right side
    842.27x = 545,474.03
  5. Step 5: Solve for x
    x = 545,474.03/842.27
  6. Step 6: Final answer
    x = 647.62

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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.