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Finding the Fourth Proportional to 543.62, 749.76 and 438.68

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Solution

The fourth proportional to 543.62, 749.76 and 438.68 is: 605.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.62 : 749.76 = 438.68 : x
  2. Step 2: Convert to fraction form
    543.62/749.76 = 438.68/x
  3. Step 3: Cross multiply
    543.62x = 749.76 × 438.68
  4. Step 4: Simplify right side
    543.62x = 328,904.72
  5. Step 5: Solve for x
    x = 328,904.72/543.62
  6. Step 6: Final answer
    x = 605.03

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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.