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Finding the Fourth Proportional to 864.44, 1,296.08 and 401.96

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Solution

The fourth proportional to 864.44, 1,296.08 and 401.96 is: 602.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.44 : 1,296.08 = 401.96 : x
  2. Step 2: Convert to fraction form
    864.44/1,296.08 = 401.96/x
  3. Step 3: Cross multiply
    864.44x = 1,296.08 × 401.96
  4. Step 4: Simplify right side
    864.44x = 520,963.83
  5. Step 5: Solve for x
    x = 520,963.83/864.44
  6. Step 6: Final answer
    x = 602.66

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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.