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Finding the Fourth Proportional to 538.45, 743.05 and 302.38

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Solution

The fourth proportional to 538.45, 743.05 and 302.38 is: 417.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.45 : 743.05 = 302.38 : x
  2. Step 2: Convert to fraction form
    538.45/743.05 = 302.38/x
  3. Step 3: Cross multiply
    538.45x = 743.05 × 302.38
  4. Step 4: Simplify right side
    538.45x = 224,683.46
  5. Step 5: Solve for x
    x = 224,683.46/538.45
  6. Step 6: Final answer
    x = 417.28

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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.