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Finding the Fourth Proportional to 543.88, 751.62 and 438.76

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Solution

The fourth proportional to 543.88, 751.62 and 438.76 is: 606.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.88 : 751.62 = 438.76 : x
  2. Step 2: Convert to fraction form
    543.88/751.62 = 438.76/x
  3. Step 3: Cross multiply
    543.88x = 751.62 × 438.76
  4. Step 4: Simplify right side
    543.88x = 329,780.79
  5. Step 5: Solve for x
    x = 329,780.79/543.88
  6. Step 6: Final answer
    x = 606.35

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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.