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Finding the Fourth Proportional to 622.40, 853.36 and 611.52

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Solution

The fourth proportional to 622.40, 853.36 and 611.52 is: 838.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.40 : 853.36 = 611.52 : x
  2. Step 2: Convert to fraction form
    622.40/853.36 = 611.52/x
  3. Step 3: Cross multiply
    622.40x = 853.36 × 611.52
  4. Step 4: Simplify right side
    622.40x = 521,846.71
  5. Step 5: Solve for x
    x = 521,846.71/622.40
  6. Step 6: Final answer
    x = 838.44

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.