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Finding the Fourth Proportional to 762.20, 1,051.73 and 447.62

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Solution

The fourth proportional to 762.20, 1,051.73 and 447.62 is: 617.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.20 : 1,051.73 = 447.62 : x
  2. Step 2: Convert to fraction form
    762.20/1,051.73 = 447.62/x
  3. Step 3: Cross multiply
    762.20x = 1,051.73 × 447.62
  4. Step 4: Simplify right side
    762.20x = 470,767.89
  5. Step 5: Solve for x
    x = 470,767.89/762.20
  6. Step 6: Final answer
    x = 617.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.