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Finding the Fourth Proportional to 543.25, 749.82 and 310.51

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Solution

The fourth proportional to 543.25, 749.82 and 310.51 is: 428.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.25 : 749.82 = 310.51 : x
  2. Step 2: Convert to fraction form
    543.25/749.82 = 310.51/x
  3. Step 3: Cross multiply
    543.25x = 749.82 × 310.51
  4. Step 4: Simplify right side
    543.25x = 232,826.61
  5. Step 5: Solve for x
    x = 232,826.61/543.25
  6. Step 6: Final answer
    x = 428.58

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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.