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Finding the Fourth Proportional to 604.98, 905.74 and 547.31

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Solution

The fourth proportional to 604.98, 905.74 and 547.31 is: 819.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.98 : 905.74 = 547.31 : x
  2. Step 2: Convert to fraction form
    604.98/905.74 = 547.31/x
  3. Step 3: Cross multiply
    604.98x = 905.74 × 547.31
  4. Step 4: Simplify right side
    604.98x = 495,720.56
  5. Step 5: Solve for x
    x = 495,720.56/604.98
  6. Step 6: Final answer
    x = 819.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.