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Finding the Fourth Proportional to 609.40, 881.20 and 609.40

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Solution

The fourth proportional to 609.40, 881.20 and 609.40 is: 881.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.40 : 881.20 = 609.40 : x
  2. Step 2: Convert to fraction form
    609.40/881.20 = 609.40/x
  3. Step 3: Cross multiply
    609.40x = 881.20 × 609.40
  4. Step 4: Simplify right side
    609.40x = 537,003.28
  5. Step 5: Solve for x
    x = 537,003.28/609.40
  6. Step 6: Final answer
    x = 881.20

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.