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Finding the Fourth Proportional to 546.64, 754.21 and 399.35

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Solution

The fourth proportional to 546.64, 754.21 and 399.35 is: 550.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.64 : 754.21 = 399.35 : x
  2. Step 2: Convert to fraction form
    546.64/754.21 = 399.35/x
  3. Step 3: Cross multiply
    546.64x = 754.21 × 399.35
  4. Step 4: Simplify right side
    546.64x = 301,193.76
  5. Step 5: Solve for x
    x = 301,193.76/546.64
  6. Step 6: Final answer
    x = 550.99

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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.