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Finding the Fourth Proportional to 538.23, 742.72 and 302.13

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Solution

The fourth proportional to 538.23, 742.72 and 302.13 is: 416.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.23 : 742.72 = 302.13 : x
  2. Step 2: Convert to fraction form
    538.23/742.72 = 302.13/x
  3. Step 3: Cross multiply
    538.23x = 742.72 × 302.13
  4. Step 4: Simplify right side
    538.23x = 224,397.99
  5. Step 5: Solve for x
    x = 224,397.99/538.23
  6. Step 6: Final answer
    x = 416.92

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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.