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Finding the Fourth Proportional to 546.21, 753.70 and 310.18

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Solution

The fourth proportional to 546.21, 753.70 and 310.18 is: 428.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.21 : 753.70 = 310.18 : x
  2. Step 2: Convert to fraction form
    546.21/753.70 = 310.18/x
  3. Step 3: Cross multiply
    546.21x = 753.70 × 310.18
  4. Step 4: Simplify right side
    546.21x = 233,781.12
  5. Step 5: Solve for x
    x = 233,781.12/546.21
  6. Step 6: Final answer
    x = 428.01

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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.