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Finding the Fourth Proportional to 581.78, 801.42 and 450.56

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Solution

The fourth proportional to 581.78, 801.42 and 450.56 is: 620.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.78 : 801.42 = 450.56 : x
  2. Step 2: Convert to fraction form
    581.78/801.42 = 450.56/x
  3. Step 3: Cross multiply
    581.78x = 801.42 × 450.56
  4. Step 4: Simplify right side
    581.78x = 361,087.80
  5. Step 5: Solve for x
    x = 361,087.80/581.78
  6. Step 6: Final answer
    x = 620.66

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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.