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Finding the Fourth Proportional to 1,628.61, 2,442.64 and 458.69

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Solution

The fourth proportional to 1,628.61, 2,442.64 and 458.69 is: 687.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628.61 : 2,442.64 = 458.69 : x
  2. Step 2: Convert to fraction form
    1,628.61/2,442.64 = 458.69/x
  3. Step 3: Cross multiply
    1,628.61x = 2,442.64 × 458.69
  4. Step 4: Simplify right side
    1,628.61x = 1,120,414.54
  5. Step 5: Solve for x
    x = 1,120,414.54/1,628.61
  6. Step 6: Final answer
    x = 687.96

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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.