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Finding the Fourth Proportional to 1,447.62, 2,171.12 and 510.68

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Solution

The fourth proportional to 1,447.62, 2,171.12 and 510.68 is: 765.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,447.62 : 2,171.12 = 510.68 : x
  2. Step 2: Convert to fraction form
    1,447.62/2,171.12 = 510.68/x
  3. Step 3: Cross multiply
    1,447.62x = 2,171.12 × 510.68
  4. Step 4: Simplify right side
    1,447.62x = 1,108,747.56
  5. Step 5: Solve for x
    x = 1,108,747.56/1,447.62
  6. Step 6: Final answer
    x = 765.91

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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.