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Finding the Fourth Proportional to 594.47, 821.58 and 447.05

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Solution

The fourth proportional to 594.47, 821.58 and 447.05 is: 617.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    594.47 : 821.58 = 447.05 : x
  2. Step 2: Convert to fraction form
    594.47/821.58 = 447.05/x
  3. Step 3: Cross multiply
    594.47x = 821.58 × 447.05
  4. Step 4: Simplify right side
    594.47x = 367,287.34
  5. Step 5: Solve for x
    x = 367,287.34/594.47
  6. Step 6: Final answer
    x = 617.84

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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.