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Finding the Fourth Proportional to 882.96, 1,324.79 and 420.95

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Solution

The fourth proportional to 882.96, 1,324.79 and 420.95 is: 631.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.96 : 1,324.79 = 420.95 : x
  2. Step 2: Convert to fraction form
    882.96/1,324.79 = 420.95/x
  3. Step 3: Cross multiply
    882.96x = 1,324.79 × 420.95
  4. Step 4: Simplify right side
    882.96x = 557,670.35
  5. Step 5: Solve for x
    x = 557,670.35/882.96
  6. Step 6: Final answer
    x = 631.59

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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.