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Finding the Fourth Proportional to 609.18, 913.15 and 348.90

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Solution

The fourth proportional to 609.18, 913.15 and 348.90 is: 522.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.18 : 913.15 = 348.90 : x
  2. Step 2: Convert to fraction form
    609.18/913.15 = 348.90/x
  3. Step 3: Cross multiply
    609.18x = 913.15 × 348.90
  4. Step 4: Simplify right side
    609.18x = 318,598.04
  5. Step 5: Solve for x
    x = 318,598.04/609.18
  6. Step 6: Final answer
    x = 522.99

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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.