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Finding the Fourth Proportional to 421.03, 581.31 and 273.93

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Solution

The fourth proportional to 421.03, 581.31 and 273.93 is: 378.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.03 : 581.31 = 273.93 : x
  2. Step 2: Convert to fraction form
    421.03/581.31 = 273.93/x
  3. Step 3: Cross multiply
    421.03x = 581.31 × 273.93
  4. Step 4: Simplify right side
    421.03x = 159,239.34
  5. Step 5: Solve for x
    x = 159,239.34/421.03
  6. Step 6: Final answer
    x = 378.21

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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.