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Finding the Fourth Proportional to 543.72, 749.75 and 403.62

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Solution

The fourth proportional to 543.72, 749.75 and 403.62 is: 556.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.72 : 749.75 = 403.62 : x
  2. Step 2: Convert to fraction form
    543.72/749.75 = 403.62/x
  3. Step 3: Cross multiply
    543.72x = 749.75 × 403.62
  4. Step 4: Simplify right side
    543.72x = 302,614.10
  5. Step 5: Solve for x
    x = 302,614.10/543.72
  6. Step 6: Final answer
    x = 556.56

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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.