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Finding the Fourth Proportional to 869.01, 1,303.48 and 320.96

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Solution

The fourth proportional to 869.01, 1,303.48 and 320.96 is: 481.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.01 : 1,303.48 = 320.96 : x
  2. Step 2: Convert to fraction form
    869.01/1,303.48 = 320.96/x
  3. Step 3: Cross multiply
    869.01x = 1,303.48 × 320.96
  4. Step 4: Simplify right side
    869.01x = 418,356.82
  5. Step 5: Solve for x
    x = 418,356.82/869.01
  6. Step 6: Final answer
    x = 481.42

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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.