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Finding the Fourth Proportional to 609.30, 855.45 and 609.30

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Solution

The fourth proportional to 609.30, 855.45 and 609.30 is: 855.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.30 : 855.45 = 609.30 : x
  2. Step 2: Convert to fraction form
    609.30/855.45 = 609.30/x
  3. Step 3: Cross multiply
    609.30x = 855.45 × 609.30
  4. Step 4: Simplify right side
    609.30x = 521,225.69
  5. Step 5: Solve for x
    x = 521,225.69/609.30
  6. Step 6: Final answer
    x = 855.45

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.