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Finding the Fourth Proportional to 615.07, 850.98 and 521.51

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Solution

The fourth proportional to 615.07, 850.98 and 521.51 is: 721.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.07 : 850.98 = 521.51 : x
  2. Step 2: Convert to fraction form
    615.07/850.98 = 521.51/x
  3. Step 3: Cross multiply
    615.07x = 850.98 × 521.51
  4. Step 4: Simplify right side
    615.07x = 443,794.58
  5. Step 5: Solve for x
    x = 443,794.58/615.07
  6. Step 6: Final answer
    x = 721.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.