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Finding the Fourth Proportional to 609.12, 918.36 and 567.36

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Solution

The fourth proportional to 609.12, 918.36 and 567.36 is: 855.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.12 : 918.36 = 567.36 : x
  2. Step 2: Convert to fraction form
    609.12/918.36 = 567.36/x
  3. Step 3: Cross multiply
    609.12x = 918.36 × 567.36
  4. Step 4: Simplify right side
    609.12x = 521,040.73
  5. Step 5: Solve for x
    x = 521,040.73/609.12
  6. Step 6: Final answer
    x = 855.40

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.