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Finding the Fourth Proportional to 544.78, 751.78 and 305.51

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Solution

The fourth proportional to 544.78, 751.78 and 305.51 is: 421.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    544.78 : 751.78 = 305.51 : x
  2. Step 2: Convert to fraction form
    544.78/751.78 = 305.51/x
  3. Step 3: Cross multiply
    544.78x = 751.78 × 305.51
  4. Step 4: Simplify right side
    544.78x = 229,676.31
  5. Step 5: Solve for x
    x = 229,676.31/544.78
  6. Step 6: Final answer
    x = 421.59

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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.