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Finding the Fourth Proportional to 538.10, 742.02 and 380.66

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Solution

The fourth proportional to 538.10, 742.02 and 380.66 is: 524.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.10 : 742.02 = 380.66 : x
  2. Step 2: Convert to fraction form
    538.10/742.02 = 380.66/x
  3. Step 3: Cross multiply
    538.10x = 742.02 × 380.66
  4. Step 4: Simplify right side
    538.10x = 282,457.33
  5. Step 5: Solve for x
    x = 282,457.33/538.10
  6. Step 6: Final answer
    x = 524.92

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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.