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Finding the Fourth Proportional to 543.17, 749.58 and 330.42

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Solution

The fourth proportional to 543.17, 749.58 and 330.42 is: 455.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.17 : 749.58 = 330.42 : x
  2. Step 2: Convert to fraction form
    543.17/749.58 = 330.42/x
  3. Step 3: Cross multiply
    543.17x = 749.58 × 330.42
  4. Step 4: Simplify right side
    543.17x = 247,676.22
  5. Step 5: Solve for x
    x = 247,676.22/543.17
  6. Step 6: Final answer
    x = 455.98

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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.