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Finding the Fourth Proportional to 546.21, 752.90 and 397.98

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Solution

The fourth proportional to 546.21, 752.90 and 397.98 is: 548.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.21 : 752.90 = 397.98 : x
  2. Step 2: Convert to fraction form
    546.21/752.90 = 397.98/x
  3. Step 3: Cross multiply
    546.21x = 752.90 × 397.98
  4. Step 4: Simplify right side
    546.21x = 299,637.15
  5. Step 5: Solve for x
    x = 299,637.15/546.21
  6. Step 6: Final answer
    x = 548.58

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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.