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Finding the Fourth Proportional to 543.72, 750.20 and 322.74

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Solution

The fourth proportional to 543.72, 750.20 and 322.74 is: 445.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.72 : 750.20 = 322.74 : x
  2. Step 2: Convert to fraction form
    543.72/750.20 = 322.74/x
  3. Step 3: Cross multiply
    543.72x = 750.20 × 322.74
  4. Step 4: Simplify right side
    543.72x = 242,119.55
  5. Step 5: Solve for x
    x = 242,119.55/543.72
  6. Step 6: Final answer
    x = 445.30

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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.