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Finding the Fourth Proportional to 356.85, 492.39 and 199.45

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Solution

The fourth proportional to 356.85, 492.39 and 199.45 is: 275.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.85 : 492.39 = 199.45 : x
  2. Step 2: Convert to fraction form
    356.85/492.39 = 199.45/x
  3. Step 3: Cross multiply
    356.85x = 492.39 × 199.45
  4. Step 4: Simplify right side
    356.85x = 98,207.19
  5. Step 5: Solve for x
    x = 98,207.19/356.85
  6. Step 6: Final answer
    x = 275.21

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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.