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Finding the Fourth Proportional to 576.56, 795.56 and 399.89

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Solution

The fourth proportional to 576.56, 795.56 and 399.89 is: 551.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.56 : 795.56 = 399.89 : x
  2. Step 2: Convert to fraction form
    576.56/795.56 = 399.89/x
  3. Step 3: Cross multiply
    576.56x = 795.56 × 399.89
  4. Step 4: Simplify right side
    576.56x = 318,130.51
  5. Step 5: Solve for x
    x = 318,130.51/576.56
  6. Step 6: Final answer
    x = 551.78

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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.