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Finding the Fourth Proportional to 547.94, 820.02 and 449.30

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Solution

The fourth proportional to 547.94, 820.02 and 449.30 is: 672.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.94 : 820.02 = 449.30 : x
  2. Step 2: Convert to fraction form
    547.94/820.02 = 449.30/x
  3. Step 3: Cross multiply
    547.94x = 820.02 × 449.30
  4. Step 4: Simplify right side
    547.94x = 368,434.99
  5. Step 5: Solve for x
    x = 368,434.99/547.94
  6. Step 6: Final answer
    x = 672.40

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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.