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Finding the Fourth Proportional to 897.96, 1,347.20 and 320.88

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Solution

The fourth proportional to 897.96, 1,347.20 and 320.88 is: 481.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.96 : 1,347.20 = 320.88 : x
  2. Step 2: Convert to fraction form
    897.96/1,347.20 = 320.88/x
  3. Step 3: Cross multiply
    897.96x = 1,347.20 × 320.88
  4. Step 4: Simplify right side
    897.96x = 432,289.54
  5. Step 5: Solve for x
    x = 432,289.54/897.96
  6. Step 6: Final answer
    x = 481.41

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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.