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Finding the Fourth Proportional to 538.07, 742.57 and 305.19

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Solution

The fourth proportional to 538.07, 742.57 and 305.19 is: 421.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.07 : 742.57 = 305.19 : x
  2. Step 2: Convert to fraction form
    538.07/742.57 = 305.19/x
  3. Step 3: Cross multiply
    538.07x = 742.57 × 305.19
  4. Step 4: Simplify right side
    538.07x = 226,624.18
  5. Step 5: Solve for x
    x = 226,624.18/538.07
  6. Step 6: Final answer
    x = 421.18

Related Problems

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Double scale
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Similar ratio
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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.