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Finding the Fourth Proportional to 879.91, 1,320.45 and 332.11

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Solution

The fourth proportional to 879.91, 1,320.45 and 332.11 is: 498.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    879.91 : 1,320.45 = 332.11 : x
  2. Step 2: Convert to fraction form
    879.91/1,320.45 = 332.11/x
  3. Step 3: Cross multiply
    879.91x = 1,320.45 × 332.11
  4. Step 4: Simplify right side
    879.91x = 438,534.65
  5. Step 5: Solve for x
    x = 438,534.65/879.91
  6. Step 6: Final answer
    x = 498.39

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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.