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Finding the Fourth Proportional to 543.54, 748.90 and 445.12

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Solution

The fourth proportional to 543.54, 748.90 and 445.12 is: 613.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.54 : 748.90 = 445.12 : x
  2. Step 2: Convert to fraction form
    543.54/748.90 = 445.12/x
  3. Step 3: Cross multiply
    543.54x = 748.90 × 445.12
  4. Step 4: Simplify right side
    543.54x = 333,350.37
  5. Step 5: Solve for x
    x = 333,350.37/543.54
  6. Step 6: Final answer
    x = 613.30

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1.5x scale

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.