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Finding the Fourth Proportional to 357.02, 492.65 and 199.66

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Solution

The fourth proportional to 357.02, 492.65 and 199.66 is: 275.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.02 : 492.65 = 199.66 : x
  2. Step 2: Convert to fraction form
    357.02/492.65 = 199.66/x
  3. Step 3: Cross multiply
    357.02x = 492.65 × 199.66
  4. Step 4: Simplify right side
    357.02x = 98,361.50
  5. Step 5: Solve for x
    x = 98,361.50/357.02
  6. Step 6: Final answer
    x = 275.51

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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.