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Finding the Fourth Proportional to 615.54, 850.53 and 492.22

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Solution

The fourth proportional to 615.54, 850.53 and 492.22 is: 680.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.54 : 850.53 = 492.22 : x
  2. Step 2: Convert to fraction form
    615.54/850.53 = 492.22/x
  3. Step 3: Cross multiply
    615.54x = 850.53 × 492.22
  4. Step 4: Simplify right side
    615.54x = 418,641.16
  5. Step 5: Solve for x
    x = 418,641.16/615.54
  6. Step 6: Final answer
    x = 680.12

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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.