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Finding the Fourth Proportional to 689.34, 1,034.01 and 304.62

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Solution

The fourth proportional to 689.34, 1,034.01 and 304.62 is: 456.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    689.34 : 1,034.01 = 304.62 : x
  2. Step 2: Convert to fraction form
    689.34/1,034.01 = 304.62/x
  3. Step 3: Cross multiply
    689.34x = 1,034.01 × 304.62
  4. Step 4: Simplify right side
    689.34x = 314,980.13
  5. Step 5: Solve for x
    x = 314,980.13/689.34
  6. Step 6: Final answer
    x = 456.93

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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.