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Finding the Fourth Proportional to 544.45, 751.46 and 387.31

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Solution

The fourth proportional to 544.45, 751.46 and 387.31 is: 534.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    544.45 : 751.46 = 387.31 : x
  2. Step 2: Convert to fraction form
    544.45/751.46 = 387.31/x
  3. Step 3: Cross multiply
    544.45x = 751.46 × 387.31
  4. Step 4: Simplify right side
    544.45x = 291,047.97
  5. Step 5: Solve for x
    x = 291,047.97/544.45
  6. Step 6: Final answer
    x = 534.57

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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.