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Finding the Fourth Proportional to 615.72, 850.30 and 572.04

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Solution

The fourth proportional to 615.72, 850.30 and 572.04 is: 789.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.72 : 850.30 = 572.04 : x
  2. Step 2: Convert to fraction form
    615.72/850.30 = 572.04/x
  3. Step 3: Cross multiply
    615.72x = 850.30 × 572.04
  4. Step 4: Simplify right side
    615.72x = 486,405.61
  5. Step 5: Solve for x
    x = 486,405.61/615.72
  6. Step 6: Final answer
    x = 789.98

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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.