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Finding the Fourth Proportional to 609.37, 912.31 and 348.91

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Solution

The fourth proportional to 609.37, 912.31 and 348.91 is: 522.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.37 : 912.31 = 348.91 : x
  2. Step 2: Convert to fraction form
    609.37/912.31 = 348.91/x
  3. Step 3: Cross multiply
    609.37x = 912.31 × 348.91
  4. Step 4: Simplify right side
    609.37x = 318,312.89
  5. Step 5: Solve for x
    x = 318,312.89/609.37
  6. Step 6: Final answer
    x = 522.36

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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.