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Finding the Fourth Proportional to 543.12, 749.13 and 333.40

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Solution

The fourth proportional to 543.12, 749.13 and 333.40 is: 459.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.12 : 749.13 = 333.40 : x
  2. Step 2: Convert to fraction form
    543.12/749.13 = 333.40/x
  3. Step 3: Cross multiply
    543.12x = 749.13 × 333.40
  4. Step 4: Simplify right side
    543.12x = 249,759.11
  5. Step 5: Solve for x
    x = 249,759.11/543.12
  6. Step 6: Final answer
    x = 459.86

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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.