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Finding the Fourth Proportional to 741.84, 1,023.78 and 447.21

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Solution

The fourth proportional to 741.84, 1,023.78 and 447.21 is: 617.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.84 : 1,023.78 = 447.21 : x
  2. Step 2: Convert to fraction form
    741.84/1,023.78 = 447.21/x
  3. Step 3: Cross multiply
    741.84x = 1,023.78 × 447.21
  4. Step 4: Simplify right side
    741.84x = 457,844.65
  5. Step 5: Solve for x
    x = 457,844.65/741.84
  6. Step 6: Final answer
    x = 617.17

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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.