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Finding the Fourth Proportional to 689.48, 1,034.63 and 324.06

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Solution

The fourth proportional to 689.48, 1,034.63 and 324.06 is: 486.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.48 : 1,034.63 = 324.06 : x
  2. Step 2: Convert to fraction form
    689.48/1,034.63 = 324.06/x
  3. Step 3: Cross multiply
    689.48x = 1,034.63 × 324.06
  4. Step 4: Simplify right side
    689.48x = 335,280.58
  5. Step 5: Solve for x
    x = 335,280.58/689.48
  6. Step 6: Final answer
    x = 486.28

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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.