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Finding the Fourth Proportional to 445.11, 613.34 and 400.76

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Solution

The fourth proportional to 445.11, 613.34 and 400.76 is: 552.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.11 : 613.34 = 400.76 : x
  2. Step 2: Convert to fraction form
    445.11/613.34 = 400.76/x
  3. Step 3: Cross multiply
    445.11x = 613.34 × 400.76
  4. Step 4: Simplify right side
    445.11x = 245,800.89
  5. Step 5: Solve for x
    x = 245,800.89/445.11
  6. Step 6: Final answer
    x = 552.23

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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.