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Finding the Fourth Proportional to 543.38, 749.83 and 307.36

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Solution

The fourth proportional to 543.38, 749.83 and 307.36 is: 424.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.38 : 749.83 = 307.36 : x
  2. Step 2: Convert to fraction form
    543.38/749.83 = 307.36/x
  3. Step 3: Cross multiply
    543.38x = 749.83 × 307.36
  4. Step 4: Simplify right side
    543.38x = 230,464.00
  5. Step 5: Solve for x
    x = 230,464.00/543.38
  6. Step 6: Final answer
    x = 424.13

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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.