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Finding the Fourth Proportional to 3,005.71, 4,508.01 and 814.61

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Solution

The fourth proportional to 3,005.71, 4,508.01 and 814.61 is: 1,221.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,005.71 : 4,508.01 = 814.61 : x
  2. Step 2: Convert to fraction form
    3,005.71/4,508.01 = 814.61/x
  3. Step 3: Cross multiply
    3,005.71x = 4,508.01 × 814.61
  4. Step 4: Simplify right side
    3,005.71x = 3,672,281.30
  5. Step 5: Solve for x
    x = 3,672,281.30/3,005.71
  6. Step 6: Final answer
    x = 1,221.77

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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.